[dpdk-dev] [PATCH v3 1/2] crypto/caam_jr: fix wrong check of fd

[wangyunjian]

From: Yunjian Wang <wangyunjian at huawei.com>

Zero is a valid fd. It will fail to check the fd if the fd is zero.
The "job_ring->uio_fd" is an fd, so define it as "int".

Fixes: e7a45f3cc245 ("crypto/caam_jr: add UIO specific operations")
Fixes: a5e1018d5e67 ("crypto/caam_jr: add routines to configure HW")
Cc: stable at dpdk.org

Signed-off-by: Yunjian Wang <wangyunjian at huawei.com>
---
v2:
 * Change "job_ring->uio_fd" type suggested by Gagandeep Singh
v3:
 * Add function to initialize g_uio_job_ring and g_job_rings
---
 drivers/crypto/caam_jr/caam_jr.c             | 23 ++++++++++++---
 drivers/crypto/caam_jr/caam_jr_hw_specific.h |  2 +-
 drivers/crypto/caam_jr/caam_jr_pvt.h         |  9 +++---
 drivers/crypto/caam_jr/caam_jr_uio.c         | 30 +++++++++++++-------
 4 files changed, 45 insertions(+), 19 deletions(-)

diff --git a/drivers/crypto/caam_jr/caam_jr.c b/drivers/crypto/caam_jr/caam_jr.c
index 5a29dd169..0f040df5c 100644
--- a/drivers/crypto/caam_jr/caam_jr.c
+++ b/drivers/crypto/caam_jr/caam_jr.c
@@ -2074,7 +2074,7 @@ static struct rte_security_ops caam_jr_security_ops = {
 static void
 close_job_ring(struct sec_job_ring_t *job_ring)
 {
-	if (job_ring->irq_fd) {
+	if (job_ring->irq_fd != -1) {
 		/* Producer index is frozen. If consumer index is not equal
 		 * with producer index, then we have descs to flush.
 		 */
@@ -2083,7 +2083,7 @@ close_job_ring(struct sec_job_ring_t *job_ring)
 
 		/* free the uio job ring */
 		free_job_ring(job_ring->irq_fd);
-		job_ring->irq_fd = 0;
+		job_ring->irq_fd = -1;
 		caam_jr_dma_free(job_ring->input_ring);
 		caam_jr_dma_free(job_ring->output_ring);
 		g_job_rings_no--;
@@ -2187,7 +2187,7 @@ caam_jr_dev_uninit(struct rte_cryptodev *dev)
  *
  */
 static void *
-init_job_ring(void *reg_base_addr, uint32_t irq_id)
+init_job_ring(void *reg_base_addr, int irq_id)
 {
 	struct sec_job_ring_t *job_ring = NULL;
 	int i, ret = 0;
@@ -2197,7 +2197,7 @@ init_job_ring(void *reg_base_addr, uint32_t irq_id)
 	int irq_coalescing_count = 0;
 
 	for (i = 0; i < MAX_SEC_JOB_RINGS; i++) {
-		if (g_job_rings[i].irq_fd == 0) {
+		if (g_job_rings[i].irq_fd == -1) {
 			job_ring = &g_job_rings[i];
 			g_job_rings_no++;
 			break;
@@ -2450,6 +2450,15 @@ cryptodev_caam_jr_remove(struct rte_vdev_device *vdev)
 	return rte_cryptodev_pmd_destroy(cryptodev);
 }
 
+static void
+sec_job_rings_init(void)
+{
+	int i;
+
+	for (i = 0; i < MAX_SEC_JOB_RINGS; i++)
+		g_job_rings[i].irq_fd = -1;
+}
+
 static struct rte_vdev_driver cryptodev_caam_jr_drv = {
 	.probe = cryptodev_caam_jr_probe,
 	.remove = cryptodev_caam_jr_remove
@@ -2464,6 +2473,12 @@ RTE_PMD_REGISTER_PARAM_STRING(CRYPTODEV_NAME_CAAM_JR_PMD,
 RTE_PMD_REGISTER_CRYPTO_DRIVER(caam_jr_crypto_drv, cryptodev_caam_jr_drv.driver,
 		cryptodev_driver_id);
 
+RTE_INIT(caam_jr_init)
+{
+	sec_uio_job_rings_init();
+	sec_job_rings_init();
+}
+
 RTE_INIT(caam_jr_init_log)
 {
 	caam_jr_logtype = rte_log_register("pmd.crypto.caam");
diff --git a/drivers/crypto/caam_jr/caam_jr_hw_specific.h b/drivers/crypto/caam_jr/caam_jr_hw_specific.h
index 5f58a585d..ec4539d1b 100644
--- a/drivers/crypto/caam_jr/caam_jr_hw_specific.h
+++ b/drivers/crypto/caam_jr/caam_jr_hw_specific.h
@@ -360,7 +360,7 @@ struct sec_job_ring_t {
 				 * bitwise operations.
 				 */
 
-	uint32_t irq_fd;	/* The file descriptor used for polling from
+	int irq_fd;	/* The file descriptor used for polling from
 				 * user space for interrupts notifications
 				 */
 	uint32_t jr_mode;	/* Model used by SEC Driver to receive
diff --git a/drivers/crypto/caam_jr/caam_jr_pvt.h b/drivers/crypto/caam_jr/caam_jr_pvt.h
index 98cd4438a..d6b3dafaa 100644
--- a/drivers/crypto/caam_jr/caam_jr_pvt.h
+++ b/drivers/crypto/caam_jr/caam_jr_pvt.h
@@ -216,7 +216,7 @@ calc_chksum(void *buffer, int len)
 }
 struct uio_job_ring {
 	uint32_t jr_id;
-	uint32_t uio_fd;
+	int uio_fd;
 	void *register_base_addr;
 	int map_size;
 	int uio_minor_number;
@@ -224,8 +224,9 @@ struct uio_job_ring {
 
 int sec_cleanup(void);
 int sec_configure(void);
+void sec_uio_job_rings_init(void);
 struct uio_job_ring *config_job_ring(void);
-void free_job_ring(uint32_t uio_fd);
+void free_job_ring(int uio_fd);
 
 /* For Dma memory allocation of specified length and alignment */
 static inline void *
@@ -279,7 +280,7 @@ static inline rte_iova_t caam_jr_dma_vtop(void *ptr)
  * @retval 0 for success
  * @retval -1 value for error
  */
-uint32_t caam_jr_enable_irqs(uint32_t uio_fd);
+uint32_t caam_jr_enable_irqs(int uio_fd);
 
 /** @brief Request to SEC kernel driver to disable interrupts for descriptor
  *  finished processing
@@ -292,6 +293,6 @@ uint32_t caam_jr_enable_irqs(uint32_t uio_fd);
  * @retval -1 value for error
  *
  */
-uint32_t caam_jr_disable_irqs(uint32_t uio_fd);
+uint32_t caam_jr_disable_irqs(int uio_fd);
 
 #endif
diff --git a/drivers/crypto/caam_jr/caam_jr_uio.c b/drivers/crypto/caam_jr/caam_jr_uio.c
index b1bb44ca4..30837c116 100644
--- a/drivers/crypto/caam_jr/caam_jr_uio.c
+++ b/drivers/crypto/caam_jr/caam_jr_uio.c
@@ -145,7 +145,7 @@ file_read_first_line(const char root[], const char subdir[],
 		 "%s/%s/%s", root, subdir, filename);
 
 	fd = open(absolute_file_name, O_RDONLY);
-	SEC_ASSERT(fd > 0, fd, "Error opening file %s",
+	SEC_ASSERT(fd >= 0, fd, "Error opening file %s",
 			absolute_file_name);
 
 	/* read UIO device name from first line in file */
@@ -179,7 +179,7 @@ file_read_first_line(const char root[], const char subdir[],
  *         kernel driver as well. No special return values are used.
  */
 static int
-sec_uio_send_command(uint32_t uio_fd, int32_t uio_command)
+sec_uio_send_command(int uio_fd, int32_t uio_command)
 {
 	int ret;
 
@@ -202,7 +202,7 @@ sec_uio_send_command(uint32_t uio_fd, int32_t uio_command)
  * @retval -1 value for error
  */
 uint32_t
-caam_jr_enable_irqs(uint32_t uio_fd)
+caam_jr_enable_irqs(int uio_fd)
 {
 	int ret;
 
@@ -233,7 +233,7 @@ caam_jr_enable_irqs(uint32_t uio_fd)
  *
  */
 uint32_t
-caam_jr_disable_irqs(uint32_t uio_fd)
+caam_jr_disable_irqs(int uio_fd)
 {
 	int ret;
 
@@ -322,12 +322,12 @@ uio_map_registers(int uio_device_fd, int uio_device_id,
 }
 
 void
-free_job_ring(uint32_t uio_fd)
+free_job_ring(int uio_fd)
 {
 	struct uio_job_ring *job_ring = NULL;
 	int i;
 
-	if (!uio_fd)
+	if (uio_fd == -1)
 		return;
 
 	for (i = 0; i < MAX_SEC_JOB_RINGS; i++) {
@@ -347,7 +347,7 @@ free_job_ring(uint32_t uio_fd)
 			job_ring->jr_id, job_ring->uio_fd);
 	close(job_ring->uio_fd);
 	g_uio_jr_num--;
-	job_ring->uio_fd = 0;
+	job_ring->uio_fd = -1;
 	if (job_ring->register_base_addr == NULL)
 		return;
 
@@ -370,7 +370,7 @@ uio_job_ring *config_job_ring(void)
 	int i;
 
 	for (i = 0; i < MAX_SEC_JOB_RINGS; i++) {
-		if (g_uio_job_ring[i].uio_fd == 0) {
+		if (g_uio_job_ring[i].uio_fd == -1) {
 			job_ring = &g_uio_job_ring[i];
 			g_uio_jr_num++;
 			break;
@@ -389,7 +389,7 @@ uio_job_ring *config_job_ring(void)
 
 	/* Open device file */
 	job_ring->uio_fd = open(uio_device_file_name, O_RDWR);
-	SEC_ASSERT(job_ring->uio_fd > 0, NULL,
+	SEC_ASSERT(job_ring->uio_fd >= 0, NULL,
 		"Failed to open UIO device file for job ring %d",
 		job_ring->jr_id);
 
@@ -488,12 +488,22 @@ sec_cleanup(void)
 		/* I need to close the fd after shutdown UIO commands need to be
 		 * sent using the fd
 		 */
-		if (job_ring->uio_fd != 0) {
+		if (job_ring->uio_fd != -1) {
 			CAAM_JR_INFO(
 			"Closed device file for job ring %d , fd = %d",
 			job_ring->jr_id, job_ring->uio_fd);
 			close(job_ring->uio_fd);
+			job_ring->uio_fd = -1;
 		}
 	}
 	return 0;
 }
+
+void
+sec_uio_job_rings_init(void)
+{
+	int i;
+
+	for (i = 0; i < MAX_SEC_JOB_RINGS; i++)
+		g_uio_job_ring[i].uio_fd = -1;
+}
-- 
2.19.1