Jason A. Donenfeld 37030f4c6e hwrng: bcm2835 - use hwrng_msleep() instead of cpu_relax() ... [ Upstream commit 96cb9d0554 ] Rather than busy looping, yield back to the scheduler and sleep for a bit in the event that there's no data. This should hopefully prevent the stalls that Mark reported: <6>[ 3.362859] Freeing initrd memory: 16196K <3>[ 23.160131] rcu: INFO: rcu_sched self-detected stall on CPU <3>[ 23.166057] rcu: 0-....: (2099 ticks this GP) idle=03b4/1/0x40000002 softirq=28/28 fqs=1050 <4>[ 23.174895] (t=2101 jiffies g=-1147 q=2353 ncpus=4) <4>[ 23.180203] CPU: 0 PID: 49 Comm: hwrng Not tainted 6.0.0 #1 <4>[ 23.186125] Hardware name: BCM2835 <4>[ 23.189837] PC is at bcm2835_rng_read+0x30/0x6c <4>[ 23.194709] LR is at hwrng_fillfn+0x71/0xf4 <4>[ 23.199218] pc : [<c07ccdc8>] lr : [<c07cb841>] psr: 40000033 <4>[ 23.205840] sp : f093df70 ip : 00000000 fp : 00000000 <4>[ 23.211404] r10: c3c7e800 r9 : 00000000 r8 : c17e6b20 <4>[ 23.216968] r7 : c17e6b64 r6 : c18b0a74 r5 : c07ccd99 r4 : c3f171c0 <4>[ 23.223855] r3 : 000fffff r2 : 00000040 r1 : c3c7e800 r0 : c3f171c0 <4>[ 23.230743] Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA Thumb Segment none <4>[ 23.238426] Control: 50c5387d Table: 0020406a DAC: 00000051 <4>[ 23.244519] CPU: 0 PID: 49 Comm: hwrng Not tainted 6.0.0 #1 Link: https://lore.kernel.org/all/Y0QJLauamRnCDUef@sirena.org.uk/ Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-11-10 18:17:24 +01:00
..
agp	IOMMU Updates for Linux v5.20/v6.0:	2022-08-06 10:42:38 -07:00
hw_random	hwrng: bcm2835 - use hwrng_msleep() instead of cpu_relax()	2022-11-10 18:17:24 +01:00
ipmi	ipmi:ipmb: Fix refcount leak in ipmi_ipmb_probe	2022-05-12 10:00:04 -05:00
mwave	char/mwave: Adjust io port register size	2021-12-03 14:27:06 +01:00
pcmcia	Char / Misc / Other smaller driver subsystem updates for 5.19-rc1	2022-06-03 11:36:34 -07:00
tpm	tpm: Add check for Failure mode for TPM2 modules	2022-08-03 23:56:20 +03:00
xilinx_hwicap	xilinx_hwicap: cleanup comments	2022-02-25 12:08:57 +01:00
xillybus	char: xillybus: fix a refcount leak in cleanup_dev()	2022-04-24 17:30:45 +02:00
Kconfig	Char / Misc driver changes for 6.0-rc1	2022-08-04 11:05:48 -07:00
Makefile	char: remove VR41XX related char driver	2022-07-28 16:12:33 +02:00
adi.c	…
apm-emulation.c	apm-emulation: drop unexpected word "the" in the comments	2022-06-27 16:15:27 +02:00
applicom.c	applicom: unneed to initialise statics to 0	2021-12-21 10:14:08 +01:00
applicom.h	…
bsr.c	powerpc/BSR: Make use of the helper macro LIST_HEAD()	2022-02-25 12:10:15 +01:00
ds1620.c	…
dsp56k.c	…
dtlk.c	…
hangcheck-timer.c	…
hpet.c	hpet: remove unused writeq/readq function definitions	2022-02-04 16:45:39 +01:00
lp.c	char: lp: remove redundant initialization of err	2022-06-10 15:29:50 +02:00
mem.c	random: restore O_NONBLOCK support	2022-10-15 08:02:55 +02:00
misc.c	char: misc: remove usage of list iterator past the loop body	2022-04-24 17:15:12 +02:00
mspec.c	char: mspec: Use kvzalloc() in mspec_mmap()	2020-08-28 12:10:04 +02:00
nsc_gpio.c	…
nvram.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
nwbutton.c	…
nwbutton.h	…
nwflash.c	…
pc8736x_gpio.c	…
powernv-op-panel.c	powerpc/powernv: Fix fall-through warning for Clang	2021-07-13 19:21:41 -05:00
ppdev.c	…
ps3flash.c	powerpc/ps3: make system bus's remove and shutdown callbacks return void	2020-12-04 01:01:22 +11:00
random.c	random: use arch_get_random*_early() in random_init()	2022-11-04 00:00:22 +09:00
scx200_gpio.c	…
sonypi.c	…
tlclk.c	…
toshiba.c	module: remove never implemented MODULE_SUPPORTED_DEVICE	2021-03-17 13:16:18 -07:00
ttyprintk.c	char: ttyprintk: register console	2022-04-22 16:24:47 +02:00
uv_mmtimer.c	…
virtio_console.c	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00