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From: Luis Chamberlain <mcgrof@kernel.org>
To: Takashi Iwai <tiwai@suse.de>
Cc: Scott Branden <scott.branden@broadcom.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andy Gross <andy.gross@linaro.org>,
	David Brown <david.brown@linaro.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Shuah Khan <shuah@kernel.org>,
	bjorn.andersson@linaro.org,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	linux-fsdevel@vger.kernel.org,
	BCM Kernel Feedback <bcm-kernel-feedback-list@broadcom.com>,
	Olof Johansson <olof@lixom.net>,
	Andrew Morton <akpm@linux-foundation.org>,
	Dan Carpenter <dan.carpenter@oracle.com>,
	Colin Ian King <colin.king@canonical.com>,
	Kees Cook <keescook@chromium.org>,
	linux-kselftest@vger.kernel.org
Subject: Re: [PATCH 3/3] firmware: add mutex fw_lock_fallback for race condition
Date: Fri, 23 Aug 2019 15:43:01 +0000
Message-ID: <20190823154301.GT16384@42.do-not-panic.com> (raw)
In-Reply-To: <s5hd0gwrx4j.wl-tiwai@suse.de>

On Fri, Aug 23, 2019 at 12:31:40PM +0200, Takashi Iwai wrote:
> So, if any, we'd need put a mutex around the fallback loader code.
> And, the mutex should be rather per device, not a global one.
> 
> Or we may trick it by appending the second parallel caller into the
> same wait queue, but the code will be more complex, so I don't think
> worth for it.

For now I'm thinking of a new API with a devname prefix to the driver.
I'll have to test if that works, but not sure if I'll get to it today
before my vacation starts (today).

  Luis

  reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-16  0:09 [PATCH 0/3] firmware: selftest for request_firmware_into_buf Scott Branden
2019-08-16  0:09 ` [PATCH 1/3] test_firmware: add support " Scott Branden
2019-08-19  5:24   ` Luis Chamberlain
2019-08-19 20:27     ` shuah
2019-08-16  0:09 ` [PATCH 2/3] selftest: firmware: Add request_firmware_into_buf tests Scott Branden
2019-08-19  5:24   ` Luis Chamberlain
2019-08-19 20:27     ` shuah
2019-08-16  0:09 ` [PATCH 3/3] firmware: add mutex fw_lock_fallback for race condition Scott Branden
2019-08-19  5:39   ` Luis Chamberlain
2019-08-19 16:19     ` Scott Branden
2019-08-20  1:26       ` Luis Chamberlain
2019-08-20 15:54         ` Scott Branden
2019-08-23 10:31         ` Takashi Iwai
2019-08-23 15:43           ` Luis Chamberlain [this message]
2019-08-23 19:56             ` Scott Branden
2019-08-23 19:48           ` Scott Branden

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