Re: [alsa-devel] [PATCH] ASoC: Intel: sst-acpi: Fix Oops in case of missing firmware

On Tue, 2014-02-25 at 16:37 +0200, Jarkko Nikula wrote:

I swear I tested missing firmware in commit e5161d7987f1 ("ASoC: Intel: sst-acpi: Request firmware before SST platform driver probing").

Unfortunately same wasn't done in commit 6dda27cbbd1d ("ASoC: Intel: sst-acpi: Add support for multiple machine drivers per platform") which will cause NULL pointer dereference in sst_acpi_fw_cb() when printing the error since sst_acpi->mach is not set.

Fix this obvious error by setting the sst_acpi->mach in sst_acpi_probe().

FWIW, I did test with the patch set from lrg's tree as of a couple days ago, and hit this crash. So I can confirm the bug for sure. I'll test the fix with a new kernel build in a couple of hours.