[PATCH] compressdev: fix device ID validation check

[ashishg at marvell.com]

From: Ashish Gupta <ashishg at marvell.com>

nb_devs is incremented / decremented each time a compressdev is
created/released. However, releasing device 1 incorrectly make device
N invalid and inaccessible. Similarly when first half of the devices
are released, rest half of the devices become inaccessible. This patch
updates the validation check to ensure correct behavior.

Signed-off-by: Ashish Gupta <ashishg at marvell.com>
---
 lib/compressdev/rte_compressdev.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/compressdev/rte_compressdev.c b/lib/compressdev/rte_compressdev.c
index 33de3f511b..8435bfa134 100644
--- a/lib/compressdev/rte_compressdev.c
+++ b/lib/compressdev/rte_compressdev.c
@@ -104,12 +104,22 @@ rte_compressdev_pmd_get_named_dev(const char *name)
 	return NULL;
 }
 
+static inline uint8_t
+rte_compressdev_is_valid_device_data(uint8_t dev_id)
+{
+	if (dev_id >= RTE_COMPRESS_MAX_DEVS ||
+			compressdev_globals.devs[dev_id].data == NULL)
+		return 0;
+
+	return 1;
+}
+
 static unsigned int
 rte_compressdev_is_valid_dev(uint8_t dev_id)
 {
 	struct rte_compressdev *dev = NULL;
 
-	if (dev_id >= compressdev_globals.nb_devs)
+	if (!rte_compressdev_is_valid_device_data(dev_id))
 		return 0;
 
 	dev = rte_compressdev_get_dev(dev_id);
-- 
2.43.0