diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2007-03-16 13:16:27 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-03-17 02:03:29 +0100 |
| commit | 46230aa6ea1671690e3e5efa2a961fc0745fe9b5 (patch) | |
| tree | 9224af1ccdb48fac6d0b400b6a76e2d62f104972 /arch/mips/kernel/kspd.c | |
| parent | [MIPS] RTLX: Protect rtlx_{read,write} with mutex. (diff) | |
| download | linux-46230aa6ea1671690e3e5efa2a961fc0745fe9b5.tar.xz linux-46230aa6ea1671690e3e5efa2a961fc0745fe9b5.zip | |
[MIPS] RTLX: Handle copy_*_user return values.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/kspd.c')
| -rw-r--r-- | arch/mips/kernel/kspd.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/mips/kernel/kspd.c b/arch/mips/kernel/kspd.c index 241ee7a2906e..29eadd404fa5 100644 --- a/arch/mips/kernel/kspd.c +++ b/arch/mips/kernel/kspd.c @@ -191,6 +191,8 @@ void sp_work_handle_request(void) struct mtsp_syscall_generic generic; struct mtsp_syscall_ret ret; struct kspd_notifications *n; + unsigned long written; + mm_segment_t old_fs; struct timeval tv; struct timezone tz; int cmd; @@ -201,7 +203,11 @@ void sp_work_handle_request(void) ret.retval = -1; - if (!rtlx_read(RTLX_CHANNEL_SYSIO, &sc, sizeof(struct mtsp_syscall), 0)) { + old_fs = get_fs(); + set_fs(KERNEL_DS); + + if (!rtlx_read(RTLX_CHANNEL_SYSIO, &sc, sizeof(struct mtsp_syscall))) { + set_fs(old_fs); printk(KERN_ERR "Expected request but nothing to read\n"); return; } @@ -209,7 +215,8 @@ void sp_work_handle_request(void) size = sc.size; if (size) { - if (!rtlx_read(RTLX_CHANNEL_SYSIO, &generic, size, 0)) { + if (!rtlx_read(RTLX_CHANNEL_SYSIO, &generic, size)) { + set_fs(old_fs); printk(KERN_ERR "Expected request but nothing to read\n"); return; } @@ -282,8 +289,11 @@ void sp_work_handle_request(void) if (vpe_getuid(SP_VPE)) sp_setfsuidgid( 0, 0); - if ((rtlx_write(RTLX_CHANNEL_SYSIO, &ret, sizeof(struct mtsp_syscall_ret), 0)) - < sizeof(struct mtsp_syscall_ret)) + old_fs = get_fs(); + set_fs(KERNEL_DS); + written = rtlx_write(RTLX_CHANNEL_SYSIO, &ret, sizeof(ret)); + set_fs(old_fs); + if (written < sizeof(ret)) printk("KSPD: sp_work_handle_request failed to send to SP\n"); } |