From: Peter Chubb Date: Thu, 20 Oct 2005 02:31:19 +0000 (+1000) Subject: [IA64] Allow simulator to use bigger disks X-Git-Tag: v2.6.16.28-rc1~3478^2~16^2^2~9^2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b6a7e1ecef66b9ecd1eed31f46ba0248d6d7e957;p=karo-tx-linux.git [IA64] Allow simulator to use bigger disks The simscsi code at present overflows an int if it's given a large disk image. The attached patch increases the possible size to 128G. While it's unlikely that anyone will want to use SKI with such a large drive, the same framework is currently being used for various virtualisation experiments. Signed-off-by: Peter Chubb Signed-off-by: Tony Luck --- diff --git a/arch/ia64/hp/sim/simscsi.c b/arch/ia64/hp/sim/simscsi.c index a18983a3c934..a3fe97531134 100644 --- a/arch/ia64/hp/sim/simscsi.c +++ b/arch/ia64/hp/sim/simscsi.c @@ -205,10 +205,11 @@ simscsi_get_disk_size (int fd) char buf[512]; /* - * This is a bit kludgey: the simulator doesn't provide a direct way of determining - * the disk size, so we do a binary search, assuming a maximum disk size of 4GB. + * This is a bit kludgey: the simulator doesn't provide a + * direct way of determining the disk size, so we do a binary + * search, assuming a maximum disk size of 128GB. */ - for (bit = (4UL << 30)/512; bit != 0; bit >>= 1) { + for (bit = (128UL << 30)/512; bit != 0; bit >>= 1) { req.addr = __pa(&buf); req.len = sizeof(buf); ia64_ssc(fd, 1, __pa(&req), ((sectors | bit) - 1)*512, SSC_READ); @@ -225,8 +226,10 @@ simscsi_readwrite10 (struct scsi_cmnd *sc, int mode) { unsigned long offset; - offset = ( (sc->cmnd[2] << 24) | (sc->cmnd[3] << 16) - | (sc->cmnd[4] << 8) | (sc->cmnd[5] << 0))*512; + offset = (((unsigned long)sc->cmnd[2] << 24) + | ((unsigned long)sc->cmnd[3] << 16) + | ((unsigned long)sc->cmnd[4] << 8) + | ((unsigned long)sc->cmnd[5] << 0))*512UL; if (sc->use_sg > 0) simscsi_sg_readwrite(sc, mode, offset); else