Thread (7 messages) 7 messages, 4 authors, 2011-01-24

[PATCH] drivers: mmc: msm: remove clock disable in probe

From: Daniel Walker <hidden>
Date: 2011-01-21 16:58:03
Also in: linux-arm-msm

On Thu, 2011-01-20 at 19:24 -0800, Saravana Kannan wrote:
On 01/19/2011 02:50 AM, Vitaly Wool wrote:
quoted
Hi,

On Tue, Jan 18, 2011 at 7:14 PM, Daniel Walker[off-list ref]  wrote:
quoted
The probe function adds the MMC host which can start accepting request
immediately. There is an assumption here that no requests happen
immediatly, but it's not always the case. This assumption can causes
a BUG() when the clocks are disabled. The fix is to just remove the
clock disable in the probe function.

Signed-off-by: Daniel Walker<redacted>
I can add acked-by and/or tested-by if needed.

~Vitaly
Nack from me. The fix is incorrect. The clocks are alread refcounted in 
the clock driver. There should be no need to "leave it on because 
someone else might access it". Every code that needs the clock should 
have a clk_enable/disable around it and it would all work fine.
You appear to be wrong Saravana .. The clocks are off at that point,
which means there's no need to disable them twice. If you look at the
MMC code mmc_add_host() will disable the clocks.

Daniel


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Sent by an consultant of the Qualcomm Innovation Center, Inc.
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