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Subject[PATCH Resend] mailbox: arm_mhuv2: Fix sparse warnings
Date
This patch fixes a bunch of sparse warnings in the newly added arm_mhuv2
driver.

drivers/mailbox/arm_mhuv2.c:506:24: warning: incorrect type in argument 1 (different address spaces)
drivers/mailbox/arm_mhuv2.c:506:24: expected void const volatile [noderef] __iomem *addr
drivers/mailbox/arm_mhuv2.c:506:24: got unsigned int [usertype] *
drivers/mailbox/arm_mhuv2.c:547:42: warning: incorrect type in argument 2 (different address spaces)
drivers/mailbox/arm_mhuv2.c:547:42: expected unsigned int [usertype] *reg
drivers/mailbox/arm_mhuv2.c:547:42: got unsigned int [noderef] __iomem *
drivers/mailbox/arm_mhuv2.c:625:42: warning: incorrect type in argument 2 (different address spaces)
drivers/mailbox/arm_mhuv2.c:625:42: expected unsigned int [usertype] *reg
drivers/mailbox/arm_mhuv2.c:625:42: got unsigned int [noderef] __iomem *
drivers/mailbox/arm_mhuv2.c:972:24: warning: dereference of noderef expression
drivers/mailbox/arm_mhuv2.c:973:22: warning: dereference of noderef expression
drivers/mailbox/arm_mhuv2.c:993:25: warning: dereference of noderef expression
drivers/mailbox/arm_mhuv2.c:1026:24: warning: dereference of noderef expression
drivers/mailbox/arm_mhuv2.c:1027:22: warning: dereference of noderef expression
drivers/mailbox/arm_mhuv2.c:1048:17: warning: dereference of noderef expression

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
Hi,

This should have been merged to 5.11-rc since the driver got introduced
in 5.11-rc1 itself. I don't see it queued for linux-next as well. It was
posted over 6 weeks back and no response is received yet:

https://lore.kernel.org/lkml/db5dd593cfd8b428ce44c1cce7484d887fa5e67c.1609303304.git.viresh.kumar@linaro.org/

Would be good if this can still go in 5.11.

drivers/mailbox/arm_mhuv2.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/mailbox/arm_mhuv2.c b/drivers/mailbox/arm_mhuv2.c
index 67fb10885bb4..8223c1005254 100644
--- a/drivers/mailbox/arm_mhuv2.c
+++ b/drivers/mailbox/arm_mhuv2.c
@@ -238,19 +238,19 @@ struct mhuv2_mbox_chan_priv {
};

/* Macro for reading a bitfield within a physically mapped packed struct */
-#define readl_relaxed_bitfield(_regptr, _field) \
+#define readl_relaxed_bitfield(_regptr, _type, _field) \
({ \
u32 _regval; \
_regval = readl_relaxed((_regptr)); \
- (*(typeof((_regptr)))(&_regval))._field; \
+ (*(_type *)(&_regval))._field; \
})

/* Macro for writing a bitfield within a physically mapped packed struct */
-#define writel_relaxed_bitfield(_value, _regptr, _field) \
+#define writel_relaxed_bitfield(_value, _regptr, _type, _field) \
({ \
u32 _regval; \
_regval = readl_relaxed(_regptr); \
- (*(typeof(_regptr))(&_regval))._field = _value; \
+ (*(_type *)(&_regval))._field = _value; \
writel_relaxed(_regval, _regptr); \
})

@@ -496,7 +496,7 @@ static const struct mhuv2_protocol_ops mhuv2_data_transfer_ops = {

/* Interrupt handlers */

-static struct mbox_chan *get_irq_chan_comb(struct mhuv2 *mhu, u32 *reg)
+static struct mbox_chan *get_irq_chan_comb(struct mhuv2 *mhu, u32 __iomem *reg)
{
struct mbox_chan *chans = mhu->mbox.chans;
int channel = 0, i, offset = 0, windows, protocol, ch_wn;
@@ -969,8 +969,8 @@ static int mhuv2_tx_init(struct amba_device *adev, struct mhuv2 *mhu,
mhu->mbox.ops = &mhuv2_sender_ops;
mhu->send = reg;

- mhu->windows = readl_relaxed_bitfield(&mhu->send->mhu_cfg, num_ch);
- mhu->minor = readl_relaxed_bitfield(&mhu->send->aidr, arch_minor_rev);
+ mhu->windows = readl_relaxed_bitfield(&mhu->send->mhu_cfg, struct mhu_cfg_t, num_ch);
+ mhu->minor = readl_relaxed_bitfield(&mhu->send->aidr, struct aidr_t, arch_minor_rev);

spin_lock_init(&mhu->doorbell_pending_lock);

@@ -990,7 +990,7 @@ static int mhuv2_tx_init(struct amba_device *adev, struct mhuv2 *mhu,
mhu->mbox.txdone_poll = false;
mhu->irq = adev->irq[0];

- writel_relaxed_bitfield(1, &mhu->send->int_en, chcomb);
+ writel_relaxed_bitfield(1, &mhu->send->int_en, struct int_en_t, chcomb);

/* Disable all channel interrupts */
for (i = 0; i < mhu->windows; i++)
@@ -1023,8 +1023,8 @@ static int mhuv2_rx_init(struct amba_device *adev, struct mhuv2 *mhu,
mhu->mbox.ops = &mhuv2_receiver_ops;
mhu->recv = reg;

- mhu->windows = readl_relaxed_bitfield(&mhu->recv->mhu_cfg, num_ch);
- mhu->minor = readl_relaxed_bitfield(&mhu->recv->aidr, arch_minor_rev);
+ mhu->windows = readl_relaxed_bitfield(&mhu->recv->mhu_cfg, struct mhu_cfg_t, num_ch);
+ mhu->minor = readl_relaxed_bitfield(&mhu->recv->aidr, struct aidr_t, arch_minor_rev);

mhu->irq = adev->irq[0];
if (!mhu->irq) {
@@ -1045,7 +1045,7 @@ static int mhuv2_rx_init(struct amba_device *adev, struct mhuv2 *mhu,
writel_relaxed(0xFFFFFFFF, &mhu->recv->ch_wn[i].mask_set);

if (mhu->minor)
- writel_relaxed_bitfield(1, &mhu->recv->int_en, chcomb);
+ writel_relaxed_bitfield(1, &mhu->recv->int_en, struct int_en_t, chcomb);

return 0;
}
--
2.25.0.rc1.19.g042ed3e048af
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