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| author | Daniel Ritz <daniel.ritz@gmx.ch> | 2005-09-09 13:03:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-09 13:57:47 -0700 |
| commit | c8751e4c0bd32ecb76434240a56a087fa223280c (patch) | |
| tree | 7c51bd027a4e82ed374b1114890bd86f1e558367 /drivers/pcmcia | |
| parent | c181e0e00ff778623c7fda055fd404a06d2c7845 (diff) | |
| download | kernel_samsung_smdk4412-c8751e4c0bd32ecb76434240a56a087fa223280c.tar.gz kernel_samsung_smdk4412-c8751e4c0bd32ecb76434240a56a087fa223280c.tar.bz2 kernel_samsung_smdk4412-c8751e4c0bd32ecb76434240a56a087fa223280c.zip | |
[PATCH] pcmcia/yenta: avoid PCI write posting problem
extend cb_writel(), exca_writeb(), exca_writel() to do a read[lb]() after
the write[lb]() to avoid possible problem with PCI write posting.
Seems to fix Bug #5061.
Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/pcmcia')
| -rw-r--r-- | drivers/pcmcia/yenta_socket.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c index 271a52b7c2e..f0997c36c9b 100644 --- a/drivers/pcmcia/yenta_socket.c +++ b/drivers/pcmcia/yenta_socket.c @@ -72,6 +72,7 @@ static inline void cb_writel(struct yenta_socket *socket, unsigned reg, u32 val) { debug("%p %04x %08x\n", socket, reg, val); writel(val, socket->base + reg); + readl(socket->base + reg); /* avoid problems with PCI write posting */ } static inline u8 config_readb(struct yenta_socket *socket, unsigned offset) @@ -136,6 +137,7 @@ static inline void exca_writeb(struct yenta_socket *socket, unsigned reg, u8 val { debug("%p %04x %02x\n", socket, reg, val); writeb(val, socket->base + 0x800 + reg); + readb(socket->base + 0x800 + reg); /* PCI write posting... */ } static void exca_writew(struct yenta_socket *socket, unsigned reg, u16 val) @@ -143,6 +145,10 @@ static void exca_writew(struct yenta_socket *socket, unsigned reg, u16 val) debug("%p %04x %04x\n", socket, reg, val); writeb(val, socket->base + 0x800 + reg); writeb(val >> 8, socket->base + 0x800 + reg + 1); + + /* PCI write posting... */ + readb(socket->base + 0x800 + reg); + readb(socket->base + 0x800 + reg + 1); } /* |