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From:   Peter Chen <peter.chen@nxp.com>
To:     Pawel Laszczak <pawell@cadence.com>
CC:     "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Rahul Kumar <kurahul@cadence.com>
Subject: Re: [PATCH 1/2] usb: cdnsp: Fixes for sparse warnings
Thread-Topic: [PATCH 1/2] usb: cdnsp: Fixes for sparse warnings
Thread-Index: AQHW0hE5ErykXup8f0OHrdJAnR2K6an3m6wAgAAGMgCAAAmhAA==
Date:   Tue, 15 Dec 2020 06:02:35 +0000
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On 20-12-15 05:27:38, Pawel Laszczak wrote:
> >
> >
> >On 20-12-14 13:03:44, Pawel Laszczak wrote:
> >> Patch fixes all sparse warnings in cdsnp driver.
> >>
> >> It fixes the following warnings:
> >> cdnsp-ring.c:1441: warning: incorrect type in assignment
> >> cdnsp-ring.c:1444: warning: restricted __le32 degrades to integer
> >> cdnsp-ring.c:2200: warning: dubious: x | !y
> >> cdnsp-gadget.c:501: warning: incorrect type in assignment
> >> cdnsp-gadget.c:504: warning: restricted __le32 degrades to integer
> >> cdnsp-gadget.c:507: warning: restricted __le32 degrades to integer
> >> cdnsp-gadget.c:508: warning: restricted __le32 degrades to integer
> >> cdnsp-gadget.c:509: warning: invalid assignment: |=3D
> >> cdnsp-gadget.c:510: warning: cast from restricted __le32
> >> cdnsp-gadget.c:558: warning: incorrect type in assignment
> >> cdnsp-gadget.c:561: warning: restricted __le32 degrades to integer
> >> cdnsp-gadget.c:570: warning: restricted __le32 degrades to integer
> >> cdnsp-gadget.c:1571: warning: incorrect type in argument 1
> >> cdnsp-gadget.c:1602: warning: restricted __le32 degrades to integer
> >> cdnsp-gadget.c:1760: warning: incorrect type in assignment
> >> cdnsp-gadget.c:1762: warning: incorrect type in assignment
> >> cdnsp-gadget.c:1763: warning: incorrect type in assignment
> >> cdnsp-gadget.c:1764: warning: incorrect type in assignment
> >> cdnsp-gadget.c:1765: warning: incorrect type in assignment
> >> cdnsp-gadget.c:1766: warning: incorrect type in assignment
> >> cdnsp-gadget.c:1767: warning: incorrect type in assignment
> >> cdnsp-gadget.c:458: warning: cast truncates bits from constant value
> >>                     (ffffffff07ffffff becomes 7ffffff)
> >> cdnsp-gadget.c:666: warning: cast truncates bits from constant value
> >>                     (ffffffff07ffffff becomes 7ffffff)
> >> cdnsp-mem.c:762: warning: incorrect type in assignment
> >> cdnsp-mem.c:763: warning: incorrect type in assignment
> >> cdnsp-mem.c:928: warning: cast from restricted __le16
> >> cdnsp-mem.c:1187: warning: incorrect type in assignment
> >> cdnsp-mem.c:1191: warning: incorrect type in assignment
> >> cdnsp-ep0.c:142: warning: incorrect type in assignment
> >> cdnsp-ep0.c:144: warning: restricted __le32 degrades to integer
> >> cdnsp-ep0.c:147: warning: restricted __le32 degrades to integer
> >> cdnsp-ep0.c:148: warning: restricted __le32 degrades to integer
> >> cdnsp-ep0.c:179: warning: incorrect type in argument 1
> >> cdnsp-ep0.c:311: warning: incorrect type in argument 1
> >> cdnsp-ep0.c:469: warning: incorrect type in assignment
> >> cdnsp-trace.h:611:1: warning: cast from restricted __le32
> >>
> >> Signed-off-by: Pawel Laszczak <pawell@cadence.com>
> >> Reported-by: kernel test robot <lkp@intel.com>
> >
> >Hi Pawel,
> >
> >The Reported-by tag should be above your Sob tag, I will change it.
> >Except the patch reported build error by kernel test robot, I will apply
> >your other four patches after finishing the compile test.
> >
> >Peter
>=20
> Hi Peter,
>=20
> I'm going to fix the "usb: cdns3: Adds missing __iomem markers"  today.
> I haven't  seen any issue on ARCH=3Dparisc. Maybe it's some specific risc=
v arch issue.
>=20
> I believe that:
> [auto build test WARNING on next-20201211]
> [cannot apply to peter.chen-usb/ci-for-usb-next v5.10 v5.10-rc7 v5.10-rc6=
 v5.10]
>=20
> is not the problem. I based on  peter.chen-usb/for-usb-next.
>=20
> Also I can't open the url from kernel test robot report.
> Maybe there is some temporary issue with server.=20
>=20

Thanks for checking it, I have already pushed your other four patches.
Besides, there is still a build error issue for new cdns3 driver.

https://www.spinics.net/lists/linux-usb/msg206073.html

Peter
> Thanks,
> Pawel
>=20
> >> ---
> >>  drivers/usb/cdns3/cdnsp-debug.h  |  2 +-
> >>  drivers/usb/cdns3/cdnsp-ep0.c    | 13 ++++++-------
> >>  drivers/usb/cdns3/cdnsp-gadget.c | 24 +++++++++---------------
> >>  drivers/usb/cdns3/cdnsp-gadget.h | 13 +++++++------
> >>  drivers/usb/cdns3/cdnsp-mem.c    | 11 ++++++-----
> >>  drivers/usb/cdns3/cdnsp-ring.c   |  4 ++--
> >>  drivers/usb/cdns3/cdnsp-trace.h  |  2 +-
> >>  7 files changed, 32 insertions(+), 37 deletions(-)
> >>
> >> diff --git a/drivers/usb/cdns3/cdnsp-debug.h b/drivers/usb/cdns3/cdnsp=
-debug.h
> >> index d6345d4d2911..a8776df2d4e0 100644
> >> --- a/drivers/usb/cdns3/cdnsp-debug.h
> >> +++ b/drivers/usb/cdns3/cdnsp-debug.h
> >> @@ -414,7 +414,7 @@ static inline const char *cdnsp_decode_slot_contex=
t(u32 info, u32 info2,
> >>  		s =3D "UNKNOWN speed";
> >>  	}
> >>
> >> -	ret =3D sprintf(str, "%s Ctx Entries %ld",
> >> +	ret =3D sprintf(str, "%s Ctx Entries %d",
> >>  		      s, (info & LAST_CTX_MASK) >> 27);
> >>
> >>  	ret +=3D sprintf(str + ret, " [Intr %ld] Addr %ld State %s",
> >> diff --git a/drivers/usb/cdns3/cdnsp-ep0.c b/drivers/usb/cdns3/cdnsp-e=
p0.c
> >> index d55b59ed7381..e2b1bcb3f80e 100644
> >> --- a/drivers/usb/cdns3/cdnsp-ep0.c
> >> +++ b/drivers/usb/cdns3/cdnsp-ep0.c
> >> @@ -137,10 +137,8 @@ int cdnsp_status_stage(struct cdnsp_device *pdev)
> >>  	return cdnsp_ep_enqueue(pdev->ep0_preq.pep, &pdev->ep0_preq);
> >>  }
> >>
> >> -static int cdnsp_w_index_to_ep_index(__le32  wIndex)
> >> +static int cdnsp_w_index_to_ep_index(u16 wIndex)
> >>  {
> >> -	wIndex =3D le32_to_cpu(wIndex);
> >> -
> >>  	if (!(wIndex & USB_ENDPOINT_NUMBER_MASK))
> >>  		return 0;
> >>
> >> @@ -176,7 +174,8 @@ static int cdnsp_ep0_handle_status(struct cdnsp_de=
vice *pdev,
> >>  		 */
> >>  		return cdnsp_ep0_delegate_req(pdev, ctrl);
> >>  	case USB_RECIP_ENDPOINT:
> >> -		pep =3D &pdev->eps[cdnsp_w_index_to_ep_index(ctrl->wIndex)];
> >> +		ep_sts =3D cdnsp_w_index_to_ep_index(le16_to_cpu(ctrl->wIndex));
> >> +		pep =3D &pdev->eps[ep_sts];
> >>  		ep_sts =3D GET_EP_CTX_STATE(pep->out_ctx);
> >>
> >>  		/* check if endpoint is stalled */
> >> @@ -305,10 +304,10 @@ static int cdnsp_ep0_handle_feature_endpoint(str=
uct cdnsp_device *pdev,
> >>  					     int set)
> >>  {
> >>  	struct cdnsp_ep *pep;
> >> -	u32 wValue;
> >> +	u16 wValue;
> >>
> >>  	wValue =3D le16_to_cpu(ctrl->wValue);
> >> -	pep =3D &pdev->eps[cdnsp_w_index_to_ep_index(ctrl->wIndex)];
> >> +	pep =3D &pdev->eps[cdnsp_w_index_to_ep_index(le16_to_cpu(ctrl->wInde=
x))];
> >>
> >>  	switch (wValue) {
> >>  	case USB_ENDPOINT_HALT:
> >> @@ -435,7 +434,7 @@ void cdnsp_setup_analyze(struct cdnsp_device *pdev=
)
> >>  {
> >>  	struct usb_ctrlrequest *ctrl =3D &pdev->setup;
> >>  	int ret =3D 0;
> >> -	__le16 len;
> >> +	u16 len;
> >>
> >>  	trace_cdnsp_ctrl_req(ctrl);
> >>
> >> diff --git a/drivers/usb/cdns3/cdnsp-gadget.c b/drivers/usb/cdns3/cdns=
p-gadget.c
> >> index 1668f72fdf30..f28f1508f049 100644
> >> --- a/drivers/usb/cdns3/cdnsp-gadget.c
> >> +++ b/drivers/usb/cdns3/cdnsp-gadget.c
> >> @@ -491,7 +491,7 @@ static void cdnsp_invalidate_ep_events(struct cdns=
p_device *pdev,
> >>  	struct cdnsp_segment *segment;
> >>  	union cdnsp_trb *event;
> >>  	u32 cycle_state;
> >> -	__le32  data;
> >> +	u32  data;
> >>
> >>  	event =3D pdev->event_ring->dequeue;
> >>  	segment =3D pdev->event_ring->deq_seg;
> >> @@ -527,9 +527,9 @@ int cdnsp_wait_for_cmd_compl(struct cdnsp_device *=
pdev)
> >>  	dma_addr_t cmd_deq_dma;
> >>  	union cdnsp_trb *event;
> >>  	u32 cycle_state;
> >> -	__le32  flags;
> >>  	int ret, val;
> >>  	u64 cmd_dma;
> >> +	u32  flags;
> >>
> >>  	cmd_trb =3D pdev->cmd.command_trb;
> >>  	pdev->cmd.status =3D 0;
> >> @@ -1568,7 +1568,7 @@ static void cdnsp_get_ep_buffering(struct cdnsp_=
device *pdev,
> >>  		return;
> >>  	}
> >>
> >> -	endpoints =3D HCS_ENDPOINTS(readl(&pdev->hcs_params1)) / 2;
> >> +	endpoints =3D HCS_ENDPOINTS(pdev->hcs_params1) / 2;
> >>
> >>  	/* Set to XBUF_TX_TAG_MASK_0 register. */
> >>  	reg +=3D XBUF_TX_CMD_OFFSET + (endpoints * 2 + 2) * sizeof(u32);
> >> @@ -1754,22 +1754,16 @@ void cdnsp_irq_reset(struct cdnsp_device *pdev=
)
> >>  static void cdnsp_get_rev_cap(struct cdnsp_device *pdev)
> >>  {
> >>  	void __iomem *reg =3D &pdev->cap_regs->hc_capbase;
> >> -	struct cdnsp_rev_cap *rev_cap;
> >>
> >>  	reg +=3D cdnsp_find_next_ext_cap(reg, 0, RTL_REV_CAP);
> >> -	rev_cap =3D reg;
> >> -
> >> -	pdev->rev_cap.ctrl_revision =3D readl(&rev_cap->ctrl_revision);
> >> -	pdev->rev_cap.rtl_revision =3D readl(&rev_cap->rtl_revision);
> >> -	pdev->rev_cap.ep_supported =3D readl(&rev_cap->ep_supported);
> >> -	pdev->rev_cap.ext_cap =3D readl(&rev_cap->ext_cap);
> >> -	pdev->rev_cap.rx_buff_size =3D readl(&rev_cap->rx_buff_size);
> >> -	pdev->rev_cap.tx_buff_size =3D readl(&rev_cap->tx_buff_size);
> >> +	pdev->rev_cap  =3D reg;
> >>
> >>  	dev_info(pdev->dev, "Rev: %08x/%08x, eps: %08x, buff: %08x/%08x\n",
> >> -		 pdev->rev_cap.ctrl_revision, pdev->rev_cap.rtl_revision,
> >> -		 pdev->rev_cap.ep_supported, pdev->rev_cap.rx_buff_size,
> >> -		 pdev->rev_cap.tx_buff_size);
> >> +		 readl(&pdev->rev_cap->ctrl_revision),
> >> +		 readl(&pdev->rev_cap->rtl_revision),
> >> +		 readl(&pdev->rev_cap->ep_supported),
> >> +		 readl(&pdev->rev_cap->rx_buff_size),
> >> +		 readl(&pdev->rev_cap->tx_buff_size));
> >>  }
> >>
> >>  static int cdnsp_gen_setup(struct cdnsp_device *pdev)
> >> diff --git a/drivers/usb/cdns3/cdnsp-gadget.h b/drivers/usb/cdns3/cdns=
p-gadget.h
> >> index 8eb1b85a08b4..6bbb26548c04 100644
> >> --- a/drivers/usb/cdns3/cdnsp-gadget.h
> >> +++ b/drivers/usb/cdns3/cdnsp-gadget.h
> >> @@ -493,11 +493,12 @@ struct cdnsp_3xport_cap {
> >>  #define CDNSP_VER_1 0x00000000
> >>  #define CDNSP_VER_2 0x10000000
> >>
> >> -#define CDNSP_IF_EP_EXIST(pdev, ep_num, dir) ((pdev)->rev_cap.ep_supp=
orted & \
> >> -			  (BIT(ep_num) << ((dir) ? 0 : 16)))
> >> +#define CDNSP_IF_EP_EXIST(pdev, ep_num, dir) \
> >> +			 (readl(&(pdev)->rev_cap->ep_supported) & \
> >> +			 (BIT(ep_num) << ((dir) ? 0 : 16)))
> >>
> >>  /**
> >> - * struct cdnsp_rev_cap - controller capabilities .
> >> + * struct cdnsp_rev_cap - controller capabilities.
> >>   * @ext_cap: Header for RTL Revision Extended Capability.
> >>   * @rtl_revision: RTL revision.
> >>   * @rx_buff_size: Rx buffer sizes.
> >> @@ -594,7 +595,7 @@ struct cdnsp_slot_ctx {
> >>  #define DEV_SPEED		GENMASK(23, 20)
> >>  #define GET_DEV_SPEED(n)	(((n) & DEV_SPEED) >> 20)
> >>  /* Index of the last valid endpoint context in this device context - =
27:31. */
> >> -#define LAST_CTX_MASK		GENMASK(31, 27)
> >> +#define LAST_CTX_MASK		((unsigned int)GENMASK(31, 27))
> >>  #define LAST_CTX(p)		((p) << 27)
> >>  #define LAST_CTX_TO_EP_NUM(p)	(((p) >> 27) - 1)
> >>  #define SLOT_FLAG		BIT(0)
> >> @@ -1351,9 +1352,9 @@ struct cdnsp_port {
> >>   * @ir_set: Current interrupter register set.
> >>   * @port20_regs: Port 2.0 Peripheral Configuration Registers.
> >>   * @port3x_regs: USB3.x Port Peripheral Configuration Registers.
> >> + * @rev_cap: Controller Capabilities Registers.
> >>   * @hcs_params1: Cached register copies of read-only HCSPARAMS1
> >>   * @hcc_params: Cached register copies of read-only HCCPARAMS1
> >> - * @rev_cap: Controller capability.
> >>   * @setup: Temporary buffer for setup packet.
> >>   * @ep0_preq: Internal allocated request used during enumeration.
> >>   * @ep0_stage: ep0 stage during enumeration process.
> >> @@ -1402,12 +1403,12 @@ struct cdnsp_device {
> >>  	struct	cdnsp_intr_reg __iomem *ir_set;
> >>  	struct cdnsp_20port_cap __iomem *port20_regs;
> >>  	struct cdnsp_3xport_cap __iomem *port3x_regs;
> >> +	struct cdnsp_rev_cap __iomem *rev_cap;
> >>
> >>  	/* Cached register copies of read-only CDNSP data */
> >>  	__u32 hcs_params1;
> >>  	__u32 hcs_params3;
> >>  	__u32 hcc_params;
> >> -	struct cdnsp_rev_cap rev_cap;
> >>  	/* Lock used in interrupt thread context. */
> >>  	spinlock_t lock;
> >>  	struct usb_ctrlrequest setup;
> >> diff --git a/drivers/usb/cdns3/cdnsp-mem.c b/drivers/usb/cdns3/cdnsp-m=
em.c
> >> index 4c7d77fb097e..7a84e928710e 100644
> >> --- a/drivers/usb/cdns3/cdnsp-mem.c
> >> +++ b/drivers/usb/cdns3/cdnsp-mem.c
> >> @@ -759,8 +759,9 @@ int cdnsp_setup_addressable_priv_dev(struct cdnsp_=
device *pdev)
> >>
> >>  	port =3D DEV_PORT(pdev->active_port->port_num);
> >>  	slot_ctx->dev_port |=3D cpu_to_le32(port);
> >> -	slot_ctx->dev_state =3D (pdev->device_address & DEV_ADDR_MASK);
> >> -	ep0_ctx->tx_info =3D EP_AVG_TRB_LENGTH(0x8);
> >> +	slot_ctx->dev_state =3D cpu_to_le32((pdev->device_address &
> >> +					   DEV_ADDR_MASK));
> >> +	ep0_ctx->tx_info =3D cpu_to_le32(EP_AVG_TRB_LENGTH(0x8));
> >>  	ep0_ctx->ep_info2 =3D cpu_to_le32(EP_TYPE(CTRL_EP));
> >>  	ep0_ctx->ep_info2 |=3D cpu_to_le32(MAX_BURST(0) | ERROR_COUNT(3) |
> >>  					 max_packets);
> >> @@ -925,7 +926,7 @@ static u32 cdnsp_get_max_esit_payload(struct usb_g=
adget *g,
> >>  	/* SuperSpeedPlus Isoc ep sending over 48k per EIST. */
> >>  	if (g->speed >=3D USB_SPEED_SUPER_PLUS &&
> >>  	    USB_SS_SSP_ISOC_COMP(pep->endpoint.desc->bmAttributes))
> >> -		return le32_to_cpu(pep->endpoint.comp_desc->wBytesPerInterval);
> >> +		return le16_to_cpu(pep->endpoint.comp_desc->wBytesPerInterval);
> >>  	/* SuperSpeed or SuperSpeedPlus Isoc ep with less than 48k per esit =
*/
> >>  	else if (g->speed >=3D USB_SPEED_SUPER)
> >>  		return le16_to_cpu(pep->endpoint.comp_desc->wBytesPerInterval);
> >> @@ -1184,11 +1185,11 @@ static int cdnsp_setup_port_arrays(struct cdns=
p_device *pdev)
> >>
> >>  	trace_cdnsp_init("Found USB 2.0 ports and  USB 3.0 ports.");
> >>
> >> -	pdev->usb2_port.regs =3D (struct cdnsp_port_regs *)
> >> +	pdev->usb2_port.regs =3D (struct cdnsp_port_regs __iomem *)
> >>  			       (&pdev->op_regs->port_reg_base + NUM_PORT_REGS *
> >>  				(pdev->usb2_port.port_num - 1));
> >>
> >> -	pdev->usb3_port.regs =3D (struct cdnsp_port_regs *)
> >> +	pdev->usb3_port.regs =3D (struct cdnsp_port_regs __iomem *)
> >>  			       (&pdev->op_regs->port_reg_base + NUM_PORT_REGS *
> >>  				(pdev->usb3_port.port_num - 1));
> >>
> >> diff --git a/drivers/usb/cdns3/cdnsp-ring.c b/drivers/usb/cdns3/cdnsp-=
ring.c
> >> index 874d9ff5406c..e15e13ba27dc 100644
> >> --- a/drivers/usb/cdns3/cdnsp-ring.c
> >> +++ b/drivers/usb/cdns3/cdnsp-ring.c
> >> @@ -1432,7 +1432,7 @@ static bool cdnsp_handle_event(struct cdnsp_devi=
ce *pdev)
> >>  	unsigned int comp_code;
> >>  	union cdnsp_trb *event;
> >>  	bool update_ptrs =3D true;
> >> -	__le32 cycle_bit;
> >> +	u32 cycle_bit;
> >>  	int ret =3D 0;
> >>  	u32 flags;
> >>
> >> @@ -2198,7 +2198,7 @@ static int cdnsp_queue_isoc_tx(struct cdnsp_devi=
ce *pdev,
> >>  	 * inverted in the first TDs isoc TRB.
> >>  	 */
> >>  	field =3D TRB_TYPE(TRB_ISOC) | TRB_TLBPC(last_burst_pkt) |
> >> -		!start_cycle | TRB_SIA | TRB_TBC(burst_count);
> >> +		start_cycle ? 0 : 1 | TRB_SIA | TRB_TBC(burst_count);
> >>
> >>  	/* Fill the rest of the TRB fields, and remaining normal TRBs. */
> >>  	for (i =3D 0; i < trbs_per_td; i++) {
> >> diff --git a/drivers/usb/cdns3/cdnsp-trace.h b/drivers/usb/cdns3/cdnsp=
-trace.h
> >> index b68e282464d2..a9de1daadf07 100644
> >> --- a/drivers/usb/cdns3/cdnsp-trace.h
> >> +++ b/drivers/usb/cdns3/cdnsp-trace.h
> >> @@ -620,7 +620,7 @@ DECLARE_EVENT_CLASS(cdnsp_log_slot_ctx,
> >>  	TP_fast_assign(
> >>  		__entry->info =3D le32_to_cpu(ctx->dev_info);
> >>  		__entry->info2 =3D le32_to_cpu(ctx->dev_port);
> >> -		__entry->int_target =3D le64_to_cpu(ctx->int_target);
> >> +		__entry->int_target =3D le32_to_cpu(ctx->int_target);
> >>  		__entry->state =3D le32_to_cpu(ctx->dev_state);
> >>  	),
> >>  	TP_printk("%s", cdnsp_decode_slot_context(__entry->info,
> >> --
> >> 2.17.1
> >>
>=20
> --
>=20
> Regards
> Pawel Laszcak

--=20

Thanks,
Peter Chen=