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Fix driver for linux >= 5.8

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This commit is contained in:
Adrien Prost-Boucle 2021-06-24 21:58:52 +02:00
parent 77b91a3644
commit f1b0a7446c
1 changed files with 12 additions and 0 deletions
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12
driver/linux/riffa_driver.c
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@ -446,7 +446,13 @@ static inline struct sg_mapping * fill_sg_buf(struct fpga_state * sc, int chnl,
}
// Page in the user pages.
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,8,0)
down_read(&current->mm->mmap_sem);
#else
mmap_read_lock(current->mm);
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
num_pages = get_user_pages(current, current->mm, udata, num_pages_reqd, 1, 0, pages, NULL);
#elsif LINUX_VERSION_CODE < KERNEL_VERSION(4,9,0)
@ -454,7 +460,13 @@ static inline struct sg_mapping * fill_sg_buf(struct fpga_state * sc, int chnl,
#else
num_pages = get_user_pages(udata, num_pages_reqd, FOLL_WRITE, pages, NULL);
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,8,0)
up_read(&current->mm->mmap_sem);
#else
mmap_read_unlock(current->mm);
#endif
if (num_pages <= 0) {
printk(KERN_ERR "riffa: fpga:%d chnl:%d, %s unable to pin any pages in memory\n", sc->id, chnl, dir);
kfree(pages);