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authorPeter Chubb <peterc@gelato.unsw.edu.au>2005-10-19 22:31:19 -0400
committerTony Luck <tony.luck@intel.com>2005-10-25 17:36:55 -0400
commitb6a7e1ecef66b9ecd1eed31f46ba0248d6d7e957 (patch)
tree682b8cf7e11ca49693b9a73420c050700b0774c7 /arch/ia64/hp
parent444d1d9bb5b724f03344c9317bc01d54a9b39073 (diff)
[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 <peterc@gelato.unsw.edu.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/hp')
-rw-r--r--arch/ia64/hp/sim/simscsi.c13
1 files changed, 8 insertions, 5 deletions
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)
205 char buf[512]; 205 char buf[512];
206 206
207 /* 207 /*
208 * This is a bit kludgey: the simulator doesn't provide a direct way of determining 208 * This is a bit kludgey: the simulator doesn't provide a
209 * the disk size, so we do a binary search, assuming a maximum disk size of 4GB. 209 * direct way of determining the disk size, so we do a binary
210 * search, assuming a maximum disk size of 128GB.
210 */ 211 */
211 for (bit = (4UL << 30)/512; bit != 0; bit >>= 1) { 212 for (bit = (128UL << 30)/512; bit != 0; bit >>= 1) {
212 req.addr = __pa(&buf); 213 req.addr = __pa(&buf);
213 req.len = sizeof(buf); 214 req.len = sizeof(buf);
214 ia64_ssc(fd, 1, __pa(&req), ((sectors | bit) - 1)*512, SSC_READ); 215 ia64_ssc(fd, 1, __pa(&req), ((sectors | bit) - 1)*512, SSC_READ);
@@ -225,8 +226,10 @@ simscsi_readwrite10 (struct scsi_cmnd *sc, int mode)
225{ 226{
226 unsigned long offset; 227 unsigned long offset;
227 228
228 offset = ( (sc->cmnd[2] << 24) | (sc->cmnd[3] << 16) 229 offset = (((unsigned long)sc->cmnd[2] << 24)
229 | (sc->cmnd[4] << 8) | (sc->cmnd[5] << 0))*512; 230 | ((unsigned long)sc->cmnd[3] << 16)
231 | ((unsigned long)sc->cmnd[4] << 8)
232 | ((unsigned long)sc->cmnd[5] << 0))*512UL;
230 if (sc->use_sg > 0) 233 if (sc->use_sg > 0)
231 simscsi_sg_readwrite(sc, mode, offset); 234 simscsi_sg_readwrite(sc, mode, offset);
232 else 235 else