From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Mark Brown <broonie@kernel.org>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Jonas Gorski <jonas.gorski@gmail.com>,
Amit Pundir <amit.pundir@linaro.org>
Subject: Re: [PATCH 4.9 11/66] spi/bcm63xx: make spi subsystem aware of message size limits
Date: Fri, 20 Jul 2018 15:39:46 +0200 [thread overview]
Message-ID: <20180720133946.GA22550@kroah.com> (raw)
In-Reply-To: <20180720123443.GF10784@sirena.org.uk>
On Fri, Jul 20, 2018 at 01:34:43PM +0100, Mark Brown wrote:
> On Fri, Jul 20, 2018 at 02:13:28PM +0200, Greg Kroah-Hartman wrote:
>
> > The bcm63xx SPI controller does not allow manual control of the CS
> > lines and will toggle it automatically before and after sending data,
> > so we are limited to messages that fit in the FIFO buffer. Since the CS
> > lines aren't available as GPIOs either, we will need to make slave
> > drivers aware of this limitation so they can handle them accordingly.
>
> Same review comment as before: this will ask other code (which
> presumably never worked?) to change how they use the hardware in order
> to cope with the limiations which seems a bit risky to me given that
> limits like this are fairly rare so that code isn't super well exercised
> in general.
Ok, now I think I understand this better. I've now dropped this, and
the follow-on fixup patch from the 4.9 queue. Thanks for being patient
with me.
greg k-h
next prev parent reply other threads:[~2018-07-20 13:39 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-20 12:13 [PATCH 4.9 00/66] 4.9.114-stable review Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 01/66] MIPS: Use async IPIs for arch_trigger_cpumask_backtrace() Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 02/66] compiler, clang: suppress warning for unused static inline functions Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 03/66] compiler, clang: properly override inline for clang Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 04/66] compiler, clang: always inline when CONFIG_OPTIMIZE_INLINING is disabled Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 05/66] compiler-gcc.h: Add __attribute__((gnu_inline)) to all inline declarations Greg Kroah-Hartman
2018-07-20 12:13 ` Greg Kroah-Hartman
2018-07-20 12:13 ` Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 06/66] x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h> Greg Kroah-Hartman
2018-07-20 12:13 ` Greg Kroah-Hartman
2018-07-20 12:13 ` Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 07/66] x86/paravirt: Make native_save_fl() extern inline Greg Kroah-Hartman
2018-07-20 12:13 ` Greg Kroah-Hartman
2018-07-20 12:13 ` Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 08/66] ocfs2: subsystem.su_mutex is required while accessing the item->ci_parent Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 09/66] ocfs2: ip_alloc_sem should be taken in ocfs2_get_block() Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 10/66] mtd: m25p80: consider max message size in m25p80_read Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 11/66] spi/bcm63xx: make spi subsystem aware of message size limits Greg Kroah-Hartman
2018-07-20 12:34 ` Mark Brown
2018-07-20 13:39 ` Greg Kroah-Hartman [this message]
2018-07-20 12:13 ` [PATCH 4.9 13/66] bcm63xx_enet: correct clock usage Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 14/66] bcm63xx_enet: do not write to random DMA channel on BCM6345 Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 15/66] crypto: crypto4xx - remove bad list_del Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 16/66] crypto: crypto4xx - fix crypto4xx_build_pdr, crypto4xx_build_sdr leak Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 17/66] atm: zatm: Fix potential Spectre v1 Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 18/66] ipvlan: fix IFLA_MTU ignored on NEWLINK Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 19/66] net: dccp: avoid crash in ccid3_hc_rx_send_feedback() Greg Kroah-Hartman
2018-07-20 12:13 ` Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 20/66] net: dccp: switch rx_tstamp_last_feedback to monotonic clock Greg Kroah-Hartman
2018-07-20 12:13 ` Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 21/66] net/mlx5: Fix incorrect raw command length parsing Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 22/66] net/mlx5: Fix wrong size allocation for QoS ETC TC regitster Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 23/66] net_sched: blackhole: tell upper qdisc about dropped packets Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 24/66] net: sungem: fix rx checksum support Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 25/66] qed: Fix use of incorrect size in memcpy call Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 26/66] qed: Limit msix vectors in kdump kernel to the minimum required count Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 28/66] r8152: napi hangup fix after disconnect Greg Kroah-Hartman
2018-07-20 12:13 ` [4.9,28/66] " Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 29/66] tcp: fix Fast Open key endianness Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 31/66] vhost_net: validate sock before trying to put its fd Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 32/66] net/packet: fix use-after-free Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 33/66] net/mlx5: Fix command interface race in polling mode Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 34/66] net: cxgb3_main: fix potential Spectre v1 Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 35/66] rtlwifi: rtl8821ae: fix firmware is not ready to run Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 36/66] net: lan78xx: Fix race in tx pending skb size calculation Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 37/66] netfilter: ebtables: reject non-bridge targets Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 38/66] reiserfs: fix buffer overflow with long warning messages Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 39/66] KEYS: DNS: fix parsing multiple options Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 40/66] netfilter: ipv6: nf_defrag: drop skb dst before queueing Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 41/66] rds: avoid unenecessary cong_update in loop transport Greg Kroah-Hartman
2018-07-20 12:13 ` [PATCH 4.9 42/66] net/nfc: Avoid stalls when nfc_alloc_send_skb() returned NULL Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 43/66] arm64: assembler: introduce ldr_this_cpu Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 44/66] KVM: arm64: Store vcpu on the stack during __guest_enter() Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 45/66] KVM: arm/arm64: Convert kvm_host_cpu_state to a static per-cpu allocation Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 46/66] KVM: arm64: Change hyp_panic()s dependency on tpidr_el2 Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 47/66] arm64: alternatives: use tpidr_el2 on VHE hosts Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 48/66] KVM: arm64: Stop save/restoring host tpidr_el1 on VHE Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 49/66] arm64: alternatives: Add dynamic patching feature Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 50/66] KVM: arm/arm64: Do not use kern_hyp_va() with kvm_vgic_global_state Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 51/66] KVM: arm64: Avoid storing the vcpu pointer on the stack Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 52/66] arm/arm64: smccc: Add SMCCC-specific return codes Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 53/66] arm64: Call ARCH_WORKAROUND_2 on transitions between EL0 and EL1 Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 54/66] arm64: Add per-cpu infrastructure to call ARCH_WORKAROUND_2 Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 55/66] arm64: Add ARCH_WORKAROUND_2 probing Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 56/66] arm64: Add ssbd command-line option Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 57/66] arm64: ssbd: Add global mitigation state accessor Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 58/66] arm64: ssbd: Skip apply_ssbd if not using dynamic mitigation Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 59/66] arm64: ssbd: Restore mitigation status on CPU resume Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 60/66] arm64: ssbd: Introduce thread flag to control userspace mitigation Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 61/66] arm64: ssbd: Add prctl interface for per-thread mitigation Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 62/66] arm64: KVM: Add HYP per-cpu accessors Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 63/66] arm64: KVM: Add ARCH_WORKAROUND_2 support for guests Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 64/66] arm64: KVM: Handle guests ARCH_WORKAROUND_2 requests Greg Kroah-Hartman
2018-07-20 12:14 ` [PATCH 4.9 65/66] arm64: KVM: Add ARCH_WORKAROUND_2 discovery through ARCH_FEATURES_FUNC_ID Greg Kroah-Hartman
2018-07-20 13:34 ` [PATCH 4.9 00/66] 4.9.114-stable review Nathan Chancellor
2018-07-20 13:40 ` Greg Kroah-Hartman
2018-07-21 7:36 ` Naresh Kamboju
2018-07-21 13:40 ` Guenter Roeck
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