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| author | Matthew Wilcox <willy@infradead.org> | 2018-06-18 16:34:34 +0300 |
|---|---|---|
| committer | Matthew Wilcox <willy@infradead.org> | 2018-08-22 06:54:19 +0300 |
| commit | cd38049e48f0d6ae151339b8882c3510a6ca6eb5 (patch) | |
| tree | 6b92818f431ea6ff2a184f43821cb280ae0d21a5 /arch | |
| parent | 5a2ab034396c063ceed167076424cf37d17cdc01 (diff) | |
| download | linux-cd38049e48f0d6ae151339b8882c3510a6ca6eb5.tar.xz | |
ppc: Convert vas ID allocation to new IDA API
Removes a custom spinlock and simplifies the code. Also fix an
error where we could allocate one ID too many.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/powernv/vas-window.c | 26 |
1 files changed, 4 insertions, 22 deletions
diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c index ff9f48812331..e59e0e60e5b5 100644 --- a/arch/powerpc/platforms/powernv/vas-window.c +++ b/arch/powerpc/platforms/powernv/vas-window.c @@ -515,35 +515,17 @@ int init_winctx_regs(struct vas_window *window, struct vas_winctx *winctx) return 0; } -static DEFINE_SPINLOCK(vas_ida_lock); - static void vas_release_window_id(struct ida *ida, int winid) { - spin_lock(&vas_ida_lock); - ida_remove(ida, winid); - spin_unlock(&vas_ida_lock); + ida_free(ida, winid); } static int vas_assign_window_id(struct ida *ida) { - int rc, winid; - - do { - rc = ida_pre_get(ida, GFP_KERNEL); - if (!rc) - return -EAGAIN; - - spin_lock(&vas_ida_lock); - rc = ida_get_new(ida, &winid); - spin_unlock(&vas_ida_lock); - } while (rc == -EAGAIN); - - if (rc) - return rc; + int winid = ida_alloc_max(ida, VAS_WINDOWS_PER_CHIP - 1, GFP_KERNEL); - if (winid > VAS_WINDOWS_PER_CHIP) { - pr_err("Too many (%d) open windows\n", winid); - vas_release_window_id(ida, winid); + if (winid == -ENOSPC) { + pr_err("Too many (%d) open windows\n", VAS_WINDOWS_PER_CHIP); return -EAGAIN; } |