From: Sergey Shtylyov <s.shtylyov@omprussia.ru>
To: "James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
<linux-scsi@vger.kernel.org>
Subject: [PATCH v3 3/3] scsi: sni_53c710: add IRQ check
Date: Tue, 30 Mar 2021 20:45:12 +0300 [thread overview]
Message-ID: <8f4b8fa5-8251-b977-70a1-9099bcb4bb17@omprussia.ru> (raw)
In-Reply-To: <137b9e4d-391f-3163-2e6f-9e21aeb6bf34@omprussia.ru>
The driver neglects to check the result of platform_get_irq()'s call and
blithely passes the negative error codes to request_irq() (which takes
*unsigned* IRQ #s), causing it to fail with -EINVAL (overridden by -ENODEV
further below). Stop calling request_irq() with the invalid IRQ #s.
Fixes: c27d85f3f3c5 ("[SCSI] SNI RM 53c710 driver")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omprussia.ru>
---
Changes in version 3:
- fixed up the patch summary.
Changes in version 2:
- new patch.
drivers/scsi/sni_53c710.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
Index: scsi/drivers/scsi/sni_53c710.c
===================================================================
--- scsi.orig/drivers/scsi/sni_53c710.c
+++ scsi/drivers/scsi/sni_53c710.c
@@ -58,6 +58,7 @@ static int snirm710_probe(struct platfor
struct NCR_700_Host_Parameters *hostdata;
struct Scsi_Host *host;
struct resource *res;
+ int rc;
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!res)
@@ -83,7 +84,9 @@ static int snirm710_probe(struct platfor
goto out_kfree;
host->this_id = 7;
host->base = base;
- host->irq = platform_get_irq(dev, 0);
+ host->irq = rc = platform_get_irq(dev, 0);
+ if (rc < 0)
+ goto out_put_host;
if(request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "snirm710", host)) {
printk(KERN_ERR "snirm710: request_irq failed!\n");
goto out_put_host;
next prev parent reply other threads:[~2021-03-30 17:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-30 17:40 [PATCH v3 0/3] Stop calling request_irq() with invalid IRQs Sergey Shtylyov
2021-03-30 17:41 ` [PATCH v3 1/3: scsi: jazz_esp: add IRQ check Sergey Shtylyov
2021-03-30 17:46 ` Sergey Shtylyov
2021-03-30 17:43 ` [PATCH v3 1/3] " Sergey Shtylyov
2021-03-30 17:44 ` [PATCH v3 2/3] scsi: sun3x_esp: " Sergey Shtylyov
2021-03-30 17:45 ` Sergey Shtylyov [this message]
2021-04-16 2:51 ` [PATCH v3 0/3] Stop calling request_irq() with invalid IRQs Martin K. Petersen
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