linux-kernel - [PATCH 7/8] sdhci: Get rid of mdelay()s where it is safe and makes sense

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]

Date:	Wed, 14 Jul 2010 17:08:09 +0400
From:	Anton Vorontsov <avorontsov@...sta.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Wolfram Sang <w.sang@...gutronix.de>,
	Albert Herranz <albert_herranz@...oo.es>,
	Matt Fleming <matt@...sole-pimps.org>,
	Ben Dooks <ben-linux@...ff.org>,
	Pierre Ossman <pierre@...man.eu>, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
Subject: [PATCH 7/8] sdhci: Get rid of mdelay()s where it is safe and makes
 sense

Since we don't run in the atomic context any longer, we can
turn mdelay()s into msleep()s.

The only place where the driver is still using mdelay() is
sdhci_send_command(). There it is possible to use sleepable
delays too, but we don't actually want to force rescheduling
in a hot path.

Sure, we might end up calling msleep() there too, just not
via this safe patch.

Signed-off-by: Anton Vorontsov <avorontsov@...sta.com>
---
 drivers/mmc/host/sdhci-of-esdhc.c |    2 +-
 drivers/mmc/host/sdhci.c          |    6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index c8623de..e9f99fe 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -94,7 +94,7 @@ static void esdhc_set_clock(struct sdhci_host *host, unsigned int clock)
 	setbits32(host->ioaddr + ESDHC_SYSTEM_CONTROL, ESDHC_CLOCK_IPGEN |
 		  ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN |
 		  div << ESDHC_DIVIDER_SHIFT | pre_div << ESDHC_PREDIV_SHIFT);
-	mdelay(100);
+	msleep(100);
 out:
 	host->clock = clock;
 }
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 56d5c56..e6adda8 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -171,7 +171,7 @@ static void sdhci_reset(struct sdhci_host *host, u8 mask)
 			return;
 		}
 		timeout--;
-		mdelay(1);
+		msleep(1);
 	}
 
 	if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
@@ -1019,7 +1019,7 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 			return;
 		}
 		timeout--;
-		mdelay(1);
+		msleep(1);
 	}
 
 	clk |= SDHCI_CLOCK_CARD_EN;
@@ -1086,7 +1086,7 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 	 * can apply clock after applying power
 	 */
 	if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
-		mdelay(10);
+		msleep(10);
 }
 
 /*****************************************************************************\
-- 
1.7.0.5

--
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/