linux-kernel - [PATCH v2] scsi: Replace printk+WARN

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Date:   Mon, 9 Jan 2023 01:43:15 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Saurabh Singh Sengar <ssengar@...rosoft.com>,
        Praveen Kumar <kumarpraveen@...ux.microsoft.com>
Subject: [PATCH v2] scsi: Replace printk+WARN_ON by WARN macro

A combination of printk() followed by WARN_ON() macro can be simplified
using a single WARN(1, ...) macro. Patch change suggested by warn.cocci
Coccinelle semantic patch.

Signed-off-by: Deepak R Varma <drv@...lo.com>
---
Changes in v2:
   - Remove printk() from the WARN macro to avoid build warning
   - I missed to build the change before sending the earlier version which
     results in a build error due to incorrect brace balancing. Fixed it.

 drivers/scsi/initio.c   | 3 +--
 drivers/scsi/scsi_lib.c | 6 ++----
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/initio.c b/drivers/scsi/initio.c
index 375261d67619..fea591d9d292 100644
--- a/drivers/scsi/initio.c
+++ b/drivers/scsi/initio.c
@@ -2738,8 +2738,7 @@ static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
 	host = (struct initio_host *) host_mem;
 	cblk = (struct scsi_ctrl_blk *) cblk_mem;
 	if ((cmnd = cblk->srb) == NULL) {
-		printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
-		WARN_ON(1);
+		WARN(1, KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
 		initio_release_scb(host, cblk);	/* Release SCB for current channel */
 		return;
 	}
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 9ed1ebcb7443..0f1e9ee4591b 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -3009,10 +3009,8 @@ void *scsi_kmap_atomic_sg(struct scatterlist *sgl, int sg_count,
 	}
 
 	if (unlikely(i == sg_count)) {
-		printk(KERN_ERR "%s: Bytes in sg: %zu, requested offset %zu, "
-			"elements %d\n",
-		       __func__, sg_len, *offset, sg_count);
-		WARN_ON(1);
+		WARN(1, KERN_ERR "%s: Bytes in sg: %zu, requested offset %zu, elements %d\n",
+				__func__, sg_len, *offset, sg_count);
 		return NULL;
 	}
 
-- 
2.34.1