From: Jie Yang Date: Mon, 14 Dec 2015 14:27:13 +0000 (+0800) Subject: ASoC: Intel: sst: fix sst_memcpy32 wrong with non-4x bytes issue X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=1cf8dfd90fe50ac660f79d4b94f47b8e721a1178;p=deliverable%2Flinux.git ASoC: Intel: sst: fix sst_memcpy32 wrong with non-4x bytes issue sst_memcpy32() only copied bytes/4 32bits, which means it dropped the remaining bytes%4 bytes wrongly. Here add copying those missing bytes, first to a 32bits tmp, and then write the tmp to 32bits iomem. Signed-off-by: Jie Yang Signed-off-by: Mark Brown --- diff --git a/sound/soc/intel/common/sst-firmware.c b/sound/soc/intel/common/sst-firmware.c index bee04a9707d8..ef4881e7753a 100644 --- a/sound/soc/intel/common/sst-firmware.c +++ b/sound/soc/intel/common/sst-firmware.c @@ -51,8 +51,22 @@ struct sst_dma { static inline void sst_memcpy32(volatile void __iomem *dest, void *src, u32 bytes) { + u32 tmp = 0; + int i, m, n; + const u8 *src_byte = src; + + m = bytes / 4; + n = bytes % 4; + /* __iowrite32_copy use 32bit size values so divide by 4 */ - __iowrite32_copy((void *)dest, src, bytes/4); + __iowrite32_copy((void *)dest, src, m); + + if (n) { + for (i = 0; i < n; i++) + tmp |= (u32)*(src_byte + m * 4 + i) << (i * 8); + __iowrite32_copy((void *)(dest + m * 4), &tmp, 1); + } + } static void sst_dma_transfer_complete(void *arg)