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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Sameer Vaze <svaze@qti.qualcomm.com>
<br>
<b>Sent:</b> Wednesday, December 17, 2025 1:06 AM<br>
<b>To:</b> Sunila Sahu <ssahu@marvell.com>; Fan Zhang <fanzhang.oss@gmail.com>; Ashish Gupta <ashishg@marvell.com><br>
<b>Cc:</b> dev@dpdk.org; Sameer Vaze <svaze@qti.qualcomm.com>; stable@dpdk.org<br>
<b>Subject:</b> [EXTERNAL] [PATCH v1] compress/zlib: fix UDC checksum logic<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">Fixes bugs with casting and checksum calculation for UDC checksum Fixes: 0dc314debb22 ("compress/zlib: support dictionaries and PDCP checksum") Cc: stable@</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">dpdk.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">org
Signed-off-by: Sameer Vaze <svaze@</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">qti.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">qualcomm.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">com>
--- drivers/compress/zlib/zlib_pmd.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">c<o:p></o:p></span></p>
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<pre style="white-space:pre-wrap"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Fixes bugs with casting and checksum calculation for<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">UDC checksum<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Fixes: 0dc314debb22 ("compress/zlib: support dictionaries and PDCP checksum")<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Cc: <a href="mailto:stable@dpdk.org">stable@dpdk.org</a><o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Signed-off-by: Sameer Vaze <<a href="mailto:svaze@qti.qualcomm.com">svaze@qti.qualcomm.com</a>><o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">---<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> drivers/compress/zlib/zlib_pmd.c | 16 ++++++++--------<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> 1 file changed, 8 insertions(+), 8 deletions(-)<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">diff --git a/drivers/compress/zlib/zlib_pmd.c b/drivers/compress/zlib/zlib_pmd.c<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">index 1d7651dd7d..bb970912cb 100644<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">--- a/drivers/compress/zlib/zlib_pmd.c<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">+++ b/drivers/compress/zlib/zlib_pmd.c<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">@@ -48,12 +48,12 @@ process_zlib_deflate_chksum(struct rte_comp_op *op,<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> return;<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> }<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">- dictionary_start = (uint32_t)(*dictionary);<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">- dictionary_end = (uint32_t)(*(dictionary + dictionary_len - 4));<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">+ dictionary_start = *(uint32_t *)dictionary;<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">+ dictionary_end = *(uint32_t *)(dictionary + dictionary_len - 4);<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> sum = (dictionary_start & BOTTOM_NIBBLE_OF_BYTES_IN_DOUBLE_WORD)<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">- + (dictionary_start & (TOP_NIBBLE_OF_BYTE_IN_DOUBLE_WORD >> 4))<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">+ + ((dictionary_start & TOP_NIBBLE_OF_BYTE_IN_DOUBLE_WORD) >> 4)<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> + (dictionary_end & BOTTOM_NIBBLE_OF_BYTES_IN_DOUBLE_WORD)<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">- + (dictionary_end & (TOP_NIBBLE_OF_BYTE_IN_DOUBLE_WORD >> 4));<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">+ + ((dictionary_end & TOP_NIBBLE_OF_BYTE_IN_DOUBLE_WORD) >> 4);<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> op->output_chksum = ~(sum_bytes[0] + sum_bytes[1] + sum_bytes[2] + sum_bytes[3])<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> & BOTTOM_NIBBLE_OF_BYTE;<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">@@ -98,12 +98,12 @@ process_zlib_inflate_chksum(struct rte_comp_op *op,<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> return;<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> }<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">- dictionary_start = (uint32_t)(*dictionary);<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">- dictionary_end = (uint32_t)(*(dictionary + dictionary_len - 4));<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">+ dictionary_start = *(uint32_t *)dictionary;<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">+ dictionary_end = *(uint32_t *)(dictionary + dictionary_len - 4);<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> sum = (dictionary_start & BOTTOM_NIBBLE_OF_BYTES_IN_DOUBLE_WORD)<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">- + (dictionary_start & (TOP_NIBBLE_OF_BYTE_IN_DOUBLE_WORD >> 4))<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">+ + ((dictionary_start & TOP_NIBBLE_OF_BYTE_IN_DOUBLE_WORD) >> 4)<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> + (dictionary_end & BOTTOM_NIBBLE_OF_BYTES_IN_DOUBLE_WORD)<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">- + (dictionary_end & (TOP_NIBBLE_OF_BYTE_IN_DOUBLE_WORD >> 4));<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">+ + ((dictionary_end & TOP_NIBBLE_OF_BYTE_IN_DOUBLE_WORD) >> 4);<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> op->output_chksum = ~(sum_bytes[0] + sum_bytes[1] + sum_bytes[2] + sum_bytes[3])<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif"> & BOTTOM_NIBBLE_OF_BYTE;<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">--<o:p></o:p></span></pre>
<pre><span style="font-size:12.0pt;font-family:"Arial",sans-serif">2.31.1<o:p></o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Aptos",sans-serif"><o:p> </o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Aptos",sans-serif">Acked-by: Ashish Gupta <ashishg@marvell.com><o:p></o:p></span></pre>
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