| mtdchar.c (fc002e3c320602d0e206f607aca0460540d7637a) | mtdchar.c (cd621274b0ec747db8dedbf857624c067f481976) |
|---|---|
| 1/* 2 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * --- 1110 unchanged lines hidden (view full) --- 1119static unsigned long mtdchar_get_unmapped_area(struct file *file, 1120 unsigned long addr, 1121 unsigned long len, 1122 unsigned long pgoff, 1123 unsigned long flags) 1124{ 1125 struct mtd_file_info *mfi = file->private_data; 1126 struct mtd_info *mtd = mfi->mtd; | 1/* 2 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * --- 1110 unchanged lines hidden (view full) --- 1119static unsigned long mtdchar_get_unmapped_area(struct file *file, 1120 unsigned long addr, 1121 unsigned long len, 1122 unsigned long pgoff, 1123 unsigned long flags) 1124{ 1125 struct mtd_file_info *mfi = file->private_data; 1126 struct mtd_info *mtd = mfi->mtd; |
| 1127 unsigned long offset; 1128 int ret; |
|
| 1127 | 1129 |
| 1128 if (mtd->get_unmapped_area) { 1129 unsigned long offset; | 1130 if (addr != 0) 1131 return (unsigned long) -EINVAL; |
| 1130 | 1132 |
| 1131 if (addr != 0) 1132 return (unsigned long) -EINVAL; | 1133 if (len > mtd->size || pgoff >= (mtd->size >> PAGE_SHIFT)) 1134 return (unsigned long) -EINVAL; |
| 1133 | 1135 |
| 1134 if (len > mtd->size || pgoff >= (mtd->size >> PAGE_SHIFT)) 1135 return (unsigned long) -EINVAL; | 1136 offset = pgoff << PAGE_SHIFT; 1137 if (offset > mtd->size - len) 1138 return (unsigned long) -EINVAL; |
| 1136 | 1139 |
| 1137 offset = pgoff << PAGE_SHIFT; 1138 if (offset > mtd->size - len) 1139 return (unsigned long) -EINVAL; 1140 1141 return mtd_get_unmapped_area(mtd, len, offset, flags); 1142 } 1143 1144 /* can't map directly */ 1145 return (unsigned long) -ENOSYS; | 1140 ret = mtd_get_unmapped_area(mtd, len, offset, flags); 1141 return ret == -EOPNOTSUPP ? -ENOSYS : ret; |
| 1146} 1147#endif 1148 1149/* 1150 * set up a mapping for shared memory segments 1151 */ 1152static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma) 1153{ --- 138 unchanged lines hidden --- | 1142} 1143#endif 1144 1145/* 1146 * set up a mapping for shared memory segments 1147 */ 1148static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma) 1149{ --- 138 unchanged lines hidden --- |