From: Kaustav Majumdar Date: Fri, 20 Oct 2006 21:44:09 +0000 (-0700) Subject: [PATCH] pcmcia: update alloc_io_space for conflict checking for multifunction PC... X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=4708b5faf7c53bb4128d34267bdfe4b8c74b488a;p=deliverable%2Flinux.git [PATCH] pcmcia: update alloc_io_space for conflict checking for multifunction PC card Some PCMCIA cards do not mention specific IO addresses in the CIS. In that case, inside the alloc_io_space function, conflicts are detected (the function returns 1) for the second function of a multifunction card unless the length of IO address range required is greater than 0x100. The following patch will remove this conflict checking for a PCMCIA function which had not mentioned any specific IO address to be mapped from. The patch is tested for Linux kernel 2.6.15.4 and works fine in the above case and is as suggested by Dave Hinds. Signed-off-by: Kaustav Majumdar Signed-off-by: Andrew Morton Signed-off-by: Dominik Brodowski --- diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c index 74cebd424032..b9201c2ec38b 100644 --- a/drivers/pcmcia/pcmcia_resource.c +++ b/drivers/pcmcia/pcmcia_resource.c @@ -95,7 +95,7 @@ static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base, * potential conflicts, just the most obvious ones. */ for (i = 0; i < MAX_IO_WIN; i++) - if ((s->io[i].res) && + if ((s->io[i].res) && *base && ((s->io[i].res->start & (align-1)) == *base)) return 1; for (i = 0; i < MAX_IO_WIN; i++) {