/* * From lib/bitmap.c * Helper functions for bitmap.h. * * This source code is licensed under the GNU General Public License, * Version 2. See the file COPYING for more details. */ #include int __bitmap_weight(const unsigned long *bitmap, int bits) { int k, w = 0, lim = bits/BITS_PER_LONG; for (k = 0; k < lim; k++) w += hweight_long(bitmap[k]); if (bits % BITS_PER_LONG) w += hweight_long(bitmap[k] & BITMAP_LAST_WORD_MASK(bits)); return w; } void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1, const unsigned long *bitmap2, int bits) { int k; int nr = BITS_TO_LONGS(bits); for (k = 0; k < nr; k++) dst[k] = bitmap1[k] | bitmap2[k]; } size_t bitmap_scnprintf(unsigned long *bitmap, int nbits, char *buf, size_t size) { /* current bit is 'cur', most recently seen range is [rbot, rtop] */ int cur, rbot, rtop; bool first = true; size_t ret = 0; rbot = cur = find_first_bit(bitmap, nbits); while (cur < nbits) { rtop = cur; cur = find_next_bit(bitmap, nbits, cur + 1); if (cur < nbits && cur <= rtop + 1) continue; if (!first) ret += scnprintf(buf + ret, size - ret, ","); first = false; ret += scnprintf(buf + ret, size - ret, "%d", rbot); if (rbot < rtop) ret += scnprintf(buf + ret, size - ret, "-%d", rtop); rbot = cur; } return ret; } int __bitmap_and(unsigned long *dst, const unsigned long *bitmap1, const unsigned long *bitmap2, unsigned int bits) { unsigned int k; unsigned int lim = bits/BITS_PER_LONG; unsigned long result = 0; for (k = 0; k < lim; k++) result |= (dst[k] = bitmap1[k] & bitmap2[k]); if (bits % BITS_PER_LONG) result |= (dst[k] = bitmap1[k] & bitmap2[k] & BITMAP_LAST_WORD_MASK(bits)); return result != 0; } /sound/pci/aw2?h=nds-private-remove'>logtreecommitdiff
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authorTony Lindgren <tony@atomide.com>2017-01-24 09:18:57 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-25 11:02:29 +0100
commit407788b51db6f6aab499d02420082f436abf3238 (patch)
treeb2fb3c885baf47cd2bd8ee0429f423b352e11905 /tools/perf/scripts
parent7a308bb3016f57e5be11a677d15b821536419d36 (diff)
usb: musb: Fix host mode error -71 regression
Commit 467d5c980709 ("usb: musb: Implement session bit based runtime PM for musb-core") started implementing musb generic runtime PM support by introducing devctl register session bit based state control. This caused a regression where if a USB mass storage device is connected to a USB hub, we can get: usb 1-1: reset high-speed USB device number 2 using musb-hdrc usb 1-1: device descriptor read/64, error -71 usb 1-1.1: new high-speed USB device number 4 using musb-hdrc This is because before the USB storage device is connected, musb is in OTG_STATE_A_SUSPEND. And we currently only set need_finish_resume in musb_stage0_irq() and the related code calling finish_resume_work in musb_resume() and musb_runtime_resume() never gets called. To fix the issue, we can call schedule_delayed_work() directly in musb_stage0_irq() to have finish_resume_work run. And we should no longer never get interrupts when when suspended. We have changed musb to no longer need pm_runtime_irqsafe(). The need_finish_resume flag was added in commit 9298b4aad37e ("usb: musb: fix device hotplug behind hub") and no longer applies as far as I can tell. So let's just remove the earlier code that no longer is needed. Fixes: 467d5c980709 ("usb: musb: Implement session bit based runtime PM for musb-core") Reported-by: Bin Liu <b-liu@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Bin Liu <b-liu@ti.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts')