sdio: add quirk to clamp byte mode transfer
Some SDIO cards expect byte transfers not to exceed the configured block transfer size. Add a quirk to that effect. Patches to make use of this quirk will be sent separately. Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: Nicolas Pitre <nico@marvell.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds
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729adf1b5f
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3fb7fb4a01
@ -189,7 +189,12 @@ static inline unsigned int sdio_max_byte_size(struct sdio_func *func)
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{
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unsigned mval = min(func->card->host->max_seg_size,
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func->card->host->max_blk_size);
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mval = min(mval, func->max_blksize);
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if (mmc_blksz_for_byte_mode(func->card))
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mval = min(mval, func->cur_blksize);
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else
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mval = min(mval, func->max_blksize);
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return min(mval, 512u); /* maximum size for byte mode */
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}
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