From 3ab87d9ce7d5546542258a1f9404460479d1d140 Mon Sep 17 00:00:00 2001 From: Tim Blechmann Date: Tue, 22 Nov 2011 11:15:45 +0100 Subject: [PATCH] ALSA: lx6464es - fix device communication via command bus commit 12ad0a988986bc6580a56f3fd8038cf36b20f92b optimized the mem*io functions that have been used to send commands to the device. these optimizations somehow corrupted the communication with the lx6464es, that resulted the device to be unusable with kernels after 2.6.33. this patch emulates the memcpy_*_io functions via a loop to avoid these problems. Signed-off-by: Tim Blechmann LKML-Reference: <4ECB5257.4040600@ladisch.de> Cc: Signed-off-by: Takashi Iwai --- sound/pci/lx6464es/lx_core.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/sound/pci/lx6464es/lx_core.c b/sound/pci/lx6464es/lx_core.c index ad52f4187e405..8c3e7fcefd99c 100644 --- a/sound/pci/lx6464es/lx_core.c +++ b/sound/pci/lx6464es/lx_core.c @@ -81,8 +81,12 @@ unsigned long lx_dsp_reg_read(struct lx6464es *chip, int port) static void lx_dsp_reg_readbuf(struct lx6464es *chip, int port, u32 *data, u32 len) { - void __iomem *address = lx_dsp_register(chip, port); - memcpy_fromio(data, address, len*sizeof(u32)); + u32 __iomem *address = lx_dsp_register(chip, port); + int i; + + /* we cannot use memcpy_fromio */ + for (i = 0; i != len; ++i) + data[i] = ioread32(address + i); } @@ -95,8 +99,12 @@ void lx_dsp_reg_write(struct lx6464es *chip, int port, unsigned data) static void lx_dsp_reg_writebuf(struct lx6464es *chip, int port, const u32 *data, u32 len) { - void __iomem *address = lx_dsp_register(chip, port); - memcpy_toio(address, data, len*sizeof(u32)); + u32 __iomem *address = lx_dsp_register(chip, port); + int i; + + /* we cannot use memcpy_to */ + for (i = 0; i != len; ++i) + iowrite32(data[i], address + i); } -- 2.39.5