From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [PATCH] [MMC] omap: Remove BUG_ON for disabled interrupts Date: Wed, 2 Jun 2010 14:05:42 -0700 Message-ID: <20100602140542.8c1073f1.akpm@linux-foundation.org> References: <1275186443-8242-1-git-send-email-darkstar6262@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1275186443-8242-1-git-send-email-darkstar6262@gmail.com> Sender: linux-mmc-owner@vger.kernel.org To: Cory Maccarrone Cc: linux-mmc@vger.kernel.org, linux-omap@vger.kernel.org, Tony Lindgren List-Id: linux-omap@vger.kernel.org On Sat, 29 May 2010 19:27:23 -0700 Cory Maccarrone wrote: > This change removes a BUG_ON for when interrupts are disabled > during an MMC request. During boot, interrupts can be disabled > when a request is made, causing this bug to be triggered. In reality, > there's no reason this should halt the kernel, as the driver has proved > reliable in spite of disabled interrupts, and additionally, there's > nothing in this code that would require interrupts to be enabled. > > Signed-off-by: Cory Maccarrone > --- > drivers/mmc/host/omap.c | 1 - > 1 files changed, 0 insertions(+), 1 deletions(-) > > diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c > index 2b28168..d98ddcf 100644 > --- a/drivers/mmc/host/omap.c > +++ b/drivers/mmc/host/omap.c > @@ -1157,7 +1157,6 @@ static void mmc_omap_start_request(struct mmc_omap_host *host, > mmc_omap_start_command(host, req->cmd); > if (host->dma_in_use) > omap_start_dma(host->dma_ch); > - BUG_ON(irqs_disabled()); > } > > static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req) So we need to decide whether this should be backported into 2.6.34.x and perhaps earlier. For that decision we'll need to know the things you didn't tell us: Which drivers are affected? Under which setups is it triggering? Why aren't lots of people reporting "hey my kernel went BUG"?