linux-kernel - [PATCH] sata: nv: fix debug format string mismatch

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Message-Id: <20210514140105.3080580-1-arnd@kernel.org>
Date:   Fri, 14 May 2021 16:01:01 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] sata: nv: fix debug format string mismatch

From: Arnd Bergmann <arnd@...db.de>

Turning on debugging in this this driver reveals a type mismatch:

In file included from include/linux/kernel.h:17,
                 from drivers/ata/sata_nv.c:23:
drivers/ata/sata_nv.c: In function 'nv_swncq_sdbfis':
drivers/ata/sata_nv.c:2121:10: error: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'u64' {aka 'long long unsigned int'} [-Werror=format=]
 2121 |  DPRINTK("id 0x%x QC: qc_active 0x%x,"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
......
 2124 |   ap->print_id, ap->qc_active, pp->qc_active,
      |                 ~~~~~~~~~~~~~
      |                   |
      |                   u64 {aka long long unsigned int}
include/linux/printk.h:142:10: note: in definition of macro 'no_printk'
  142 |   printk(fmt, ##__VA_ARGS__);  \
      |          ^~~
drivers/ata/sata_nv.c:2121:2: note: in expansion of macro 'DPRINTK'
 2121 |  DPRINTK("id 0x%x QC: qc_active 0x%x,"
      |  ^~~~~~~
drivers/ata/sata_nv.c:2121:36: note: format string is defined here
 2121 |  DPRINTK("id 0x%x QC: qc_active 0x%x,"
      |                                   ~^
      |                                    |
      |                                    unsigned int
      |                                   %llx

Use the correct format string for the u64 type.

Fixes: e3ed89396441 ("libata: bump ->qc_active to a 64-bit type")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/ata/sata_nv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 20190f66ced9..de4504556669 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -2118,7 +2118,7 @@ static int nv_swncq_sdbfis(struct ata_port *ap)
 		 */
 		lack_dhfis = 1;
 
-	DPRINTK("id 0x%x QC: qc_active 0x%x,"
+	DPRINTK("id 0x%x QC: qc_active 0x%llx,"
 		"SWNCQ:qc_active 0x%X defer_bits %X "
 		"dhfis 0x%X dmafis 0x%X last_issue_tag %x\n",
 		ap->print_id, ap->qc_active, pp->qc_active,
-- 
2.29.2