On Sun, Mar 20, 2005 at 11:57:44AM +0100, Jean Delvare wrote: > Hi Greg, > > It was reported that the i2c-viapro SMBus driver sometimes has trouble > on recent systems (VT8237 south bridge). The "Host Status" register has > at least one additional bit used when compared with older south bridges > of this family. The driver currently considers this additional bit as an > error condition when it's set, causing repeated bus resets and sometimes > read failures. > > This patch makes the driver ignore the bits of the "Host Status" > register for which no definition is known. I wish I had a datasheet for > the VIA VT8237, so that I could check what the additional bit is > supposed to mean, but I don't. If someone has a datasheet or good > contacts at VIA, please let me know. > > The patch was reported to fix the problem on a system with the VT8237, > and was also tested not to break the driver on older VIA south bridges, > so it seems to be safe. Thanks to Aurelien Jarno for the tests. > > Additionally, the patch makes the post-transaction bus reset slightly > more efficient by sparing a few unneeded I/O operations. > > Please apply, Applied, thanks. greg k-h
