From c02205e9f3f8e4429e5531981906bf25282938b7 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 26 May 2017 23:56:13 -0400 Subject: [PATCH] dio: use probe_kernel_read() Signed-off-by: Al Viro --- drivers/dio/dio.c | 17 ++--------------- 1 file changed, 2 insertions(+), 15 deletions(-) diff --git a/drivers/dio/dio.c b/drivers/dio/dio.c index 830184529109..0d0677f23916 100644 --- a/drivers/dio/dio.c +++ b/drivers/dio/dio.c @@ -116,7 +116,6 @@ int __init dio_find(int deviceid) */ int scode, id; u_char prid, secid, i; - mm_segment_t fs; for (scode = 0; scode < DIO_SCMAX; scode++) { void *va; @@ -135,17 +134,12 @@ int __init dio_find(int deviceid) else va = ioremap(pa, PAGE_SIZE); - fs = get_fs(); - set_fs(KERNEL_DS); - - if (get_user(i, (unsigned char *)va + DIO_IDOFF)) { - set_fs(fs); + if (probe_kernel_read(&i, (unsigned char *)va + DIO_IDOFF, 1)) { if (scode >= DIOII_SCBASE) iounmap(va); continue; /* no board present at that select code */ } - set_fs(fs); prid = DIO_ID(va); if (DIO_NEEDSSECID(prid)) { @@ -170,7 +164,6 @@ int __init dio_find(int deviceid) static int __init dio_init(void) { int scode; - mm_segment_t fs; int i; struct dio_dev *dev; int error; @@ -214,18 +207,12 @@ static int __init dio_init(void) else va = ioremap(pa, PAGE_SIZE); - fs = get_fs(); - set_fs(KERNEL_DS); - - if (get_user(i, (unsigned char *)va + DIO_IDOFF)) { - set_fs(fs); + if (probe_kernel_read(&i, (unsigned char *)va + DIO_IDOFF, 1)) { if (scode >= DIOII_SCBASE) iounmap(va); continue; /* no board present at that select code */ } - set_fs(fs); - /* Found a board, allocate it an entry in the list */ dev = kzalloc(sizeof(struct dio_dev), GFP_KERNEL); if (!dev) -- 2.20.1