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| author | Takashi Iwai <tiwai@suse.de> | 2011-06-30 17:08:04 +0400 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-06-30 17:33:57 +0400 |
| commit | 4f3c7a18d9e8a287d31f828a259d713fe4859471 (patch) | |
| tree | eb587895c24cdf975caa9241443be4f1038d6d8a | |
| parent | 286bed0f0c447b6660e72093d7e778784fdd9ee6 (diff) | |
| download | linux-4f3c7a18d9e8a287d31f828a259d713fe4859471.tar.xz | |
ALSA: sb16 - Fix build errors on MIPS and others with 13bit ioctl size
One of ioctl definition in sound/sb16_csp.h contains the data size
over 8kB, and this causes build errors on architectures like MIPS,
which define _IOC_SIZEBITS=13.
For avoiding this build errors but keeping the compatibility, manually
expand with _IOC() instead of using _IOW() for the problematic ioctl.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | include/sound/sb16_csp.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/sound/sb16_csp.h b/include/sound/sb16_csp.h index 736eac71d053..af1b49e982df 100644 --- a/include/sound/sb16_csp.h +++ b/include/sound/sb16_csp.h @@ -99,7 +99,14 @@ struct snd_sb_csp_info { /* get CSP information */ #define SNDRV_SB_CSP_IOCTL_INFO _IOR('H', 0x10, struct snd_sb_csp_info) /* load microcode to CSP */ -#define SNDRV_SB_CSP_IOCTL_LOAD_CODE _IOW('H', 0x11, struct snd_sb_csp_microcode) +/* NOTE: struct snd_sb_csp_microcode overflows the max size (13 bits) + * defined for some architectures like MIPS, and it leads to build errors. + * (x86 and co have 14-bit size, thus it's valid, though.) + * As a workaround for skipping the size-limit check, here we don't use the + * normal _IOW() macro but _IOC() with the manual argument. + */ +#define SNDRV_SB_CSP_IOCTL_LOAD_CODE \ + _IOC(_IOC_WRITE, 'H', 0x11, sizeof(struct snd_sb_csp_microcode)) /* unload microcode from CSP */ #define SNDRV_SB_CSP_IOCTL_UNLOAD_CODE _IO('H', 0x12) /* start CSP */ |