linux-kernel - [PATCH 4/5] mtd: st_spi_fsm: Allow loop to run at least once before giving up CPU

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1395313907-25318-5-git-send-email-lee.jones@linaro.org>
Date:	Thu, 20 Mar 2014 11:11:46 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	computersforpeace@...il.com
Cc:	lee.jones@...aro.org, kernel@...inux.com,
	linux-mtd@...ts.infradead.org, dwmw2@...radead.org,
	angus.clark@...com
Subject: [PATCH 4/5] mtd: st_spi_fsm: Allow loop to run at least once before giving up CPU

Reported-by: Brian Norris <computersforpeace@...il.com>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/mtd/devices/st_spi_fsm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index 9de753d..921b44a 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -860,8 +860,6 @@ static uint8_t stfsm_wait_busy(struct stfsm *fsm)
 	 */
 	deadline = jiffies + FLASH_MAX_BUSY_WAIT;
 	while (!timeout) {
-		cond_resched();
-
 		if (time_after_eq(jiffies, deadline))
 			timeout = 1;
 
@@ -880,6 +878,8 @@ static uint8_t stfsm_wait_busy(struct stfsm *fsm)
 		if (!timeout)
 			/* Restart */
 			writel(seq->seq_cfg, fsm->base + SPI_FAST_SEQ_CFG);
+
+		cond_resched();
 	}
 
 	dev_err(fsm->dev, "timeout on wait_busy\n");
-- 
1.8.3.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/