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From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
To: Qiang Zhao <qiang.zhao@nxp.com>, Li Yang <leoyang.li@nxp.com>,
	Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Scott Wood <oss@buserror.net>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 39/47] soc: fsl: qe: avoid IS_ERR_VALUE in ucc_slow.c
Date: Fri,  8 Nov 2019 14:01:15 +0100
Message-ID: <20191108130123.6839-40-linux@rasmusvillemoes.dk> (raw)
In-Reply-To: <20191108130123.6839-1-linux@rasmusvillemoes.dk>

When trying to build this for a 64-bit platform, one gets warnings
from using IS_ERR_VALUE on something which is not sizeof(long).

Instead, change the various *_offset fields to store a signed integer,
and simply check for a negative return from qe_muram_alloc(). Since
qe_muram_free() now accepts and ignores a negative argument, we only
need to make sure these fields are initialized with -1, and we can
just unconditionally call qe_muram_free() in ucc_slow_free().

Note that the error case for us_pram_offset failed to set that field
to 0 (which, as noted earlier, is anyway a bogus sentinel value).

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
---
 drivers/soc/fsl/qe/ucc_slow.c | 22 +++++++++-------------
 include/soc/fsl/qe/ucc_slow.h |  6 +++---
 2 files changed, 12 insertions(+), 16 deletions(-)

diff --git a/drivers/soc/fsl/qe/ucc_slow.c b/drivers/soc/fsl/qe/ucc_slow.c
index 9b55fd0f50c6..274d34449846 100644
--- a/drivers/soc/fsl/qe/ucc_slow.c
+++ b/drivers/soc/fsl/qe/ucc_slow.c
@@ -154,6 +154,9 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
 			__func__);
 		return -ENOMEM;
 	}
+	uccs->rx_base_offset = -1;
+	uccs->tx_base_offset = -1;
+	uccs->us_pram_offset = -1;
 
 	/* Fill slow UCC structure */
 	uccs->us_info = us_info;
@@ -179,7 +182,7 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
 	/* Get PRAM base */
 	uccs->us_pram_offset =
 		qe_muram_alloc(UCC_SLOW_PRAM_SIZE, ALIGNMENT_OF_UCC_SLOW_PRAM);
-	if (IS_ERR_VALUE(uccs->us_pram_offset)) {
+	if (uccs->us_pram_offset < 0) {
 		printk(KERN_ERR "%s: cannot allocate MURAM for PRAM", __func__);
 		ucc_slow_free(uccs);
 		return -ENOMEM;
@@ -206,10 +209,9 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
 	uccs->rx_base_offset =
 		qe_muram_alloc(us_info->rx_bd_ring_len * sizeof(struct qe_bd),
 				QE_ALIGNMENT_OF_BD);
-	if (IS_ERR_VALUE(uccs->rx_base_offset)) {
+	if (uccs->rx_base_offset < 0) {
 		printk(KERN_ERR "%s: cannot allocate %u RX BDs\n", __func__,
 			us_info->rx_bd_ring_len);
-		uccs->rx_base_offset = 0;
 		ucc_slow_free(uccs);
 		return -ENOMEM;
 	}
@@ -217,9 +219,8 @@ int ucc_slow_init(struct ucc_slow_info * us_info, struct ucc_slow_private ** ucc
 	uccs->tx_base_offset =
 		qe_muram_alloc(us_info->tx_bd_ring_len * sizeof(struct qe_bd),
 			QE_ALIGNMENT_OF_BD);
-	if (IS_ERR_VALUE(uccs->tx_base_offset)) {
+	if (uccs->tx_base_offset < 0) {
 		printk(KERN_ERR "%s: cannot allocate TX BDs", __func__);
-		uccs->tx_base_offset = 0;
 		ucc_slow_free(uccs);
 		return -ENOMEM;
 	}
@@ -352,14 +353,9 @@ void ucc_slow_free(struct ucc_slow_private * uccs)
 	if (!uccs)
 		return;
 
-	if (uccs->rx_base_offset)
-		qe_muram_free(uccs->rx_base_offset);
-
-	if (uccs->tx_base_offset)
-		qe_muram_free(uccs->tx_base_offset);
-
-	if (uccs->us_pram)
-		qe_muram_free(uccs->us_pram_offset);
+	qe_muram_free(uccs->rx_base_offset);
+	qe_muram_free(uccs->tx_base_offset);
+	qe_muram_free(uccs->us_pram_offset);
 
 	if (uccs->us_regs)
 		iounmap(uccs->us_regs);
diff --git a/include/soc/fsl/qe/ucc_slow.h b/include/soc/fsl/qe/ucc_slow.h
index 8696fdea2ae9..d187a6be83bc 100644
--- a/include/soc/fsl/qe/ucc_slow.h
+++ b/include/soc/fsl/qe/ucc_slow.h
@@ -185,7 +185,7 @@ struct ucc_slow_private {
 	struct ucc_slow_info *us_info;
 	struct ucc_slow __iomem *us_regs; /* Ptr to memory map of UCC regs */
 	struct ucc_slow_pram *us_pram;	/* a pointer to the parameter RAM */
-	u32 us_pram_offset;
+	s32 us_pram_offset;
 	int enabled_tx;		/* Whether channel is enabled for Tx (ENT) */
 	int enabled_rx;		/* Whether channel is enabled for Rx (ENR) */
 	int stopped_tx;		/* Whether channel has been stopped for Tx
@@ -194,8 +194,8 @@ struct ucc_slow_private {
 	struct list_head confQ;	/* frames passed to chip waiting for tx */
 	u32 first_tx_bd_mask;	/* mask is used in Tx routine to save status
 				   and length for first BD in a frame */
-	u32 tx_base_offset;	/* first BD in Tx BD table offset (In MURAM) */
-	u32 rx_base_offset;	/* first BD in Rx BD table offset (In MURAM) */
+	s32 tx_base_offset;	/* first BD in Tx BD table offset (In MURAM) */
+	s32 rx_base_offset;	/* first BD in Rx BD table offset (In MURAM) */
 	struct qe_bd *confBd;	/* next BD for confirm after Tx */
 	struct qe_bd *tx_bd;	/* next BD for new Tx request */
 	struct qe_bd *rx_bd;	/* next BD to collect after Rx */
-- 
2.23.0


  parent reply index

Thread overview: 80+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-08 13:00 [PATCH v4 00/47] QUICC Engine support on ARM and ARM64 Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 01/47] soc: fsl: qe: remove space-before-tab Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 02/47] soc: fsl: qe: drop volatile qualifier of struct qe_ic::regs Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 03/47] soc: fsl: qe: rename qe_(clr/set/clrset)bit* helpers Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 04/47] soc: fsl: qe: introduce qe_io{read,write}* wrappers Rasmus Villemoes
2019-11-12  5:17   ` [PATCH v4 04/47] soc: fsl: qe: introduce qe_io{read, write}* wrappers Timur Tabi
2019-11-12  7:14     ` [PATCH v4 04/47] soc: fsl: qe: introduce qe_io{read,write}* wrappers Rasmus Villemoes
2019-11-14  5:08       ` Timur Tabi
2019-11-14  8:55         ` Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 05/47] soc: fsl: qe: avoid ppc-specific io accessors Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 06/47] soc: fsl: qe: replace spin_event_timeout by readx_poll_timeout_atomic Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 07/47] soc: fsl: qe: qe.c: guard use of pvr_version_is() with CONFIG_PPC32 Rasmus Villemoes
2019-11-15  4:50   ` Timur Tabi
2019-11-15  8:11     ` Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 08/47] soc: fsl: qe: drop unneeded #includes Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 09/47] soc: fsl: qe: drop assign-only high_active in qe_ic_init Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 10/47] soc: fsl: qe: remove pointless sysfs registration in qe_ic.c Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 11/47] soc: fsl: qe: use qe_ic_cascade_{low, high}_mpic also on 83xx Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 12/47] soc: fsl: qe: move calls of qe_ic_init out of arch/powerpc/ Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 13/47] powerpc/83xx: remove mpc83xx_ipic_and_qe_init_IRQ Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 14/47] powerpc/85xx: remove mostly pointless mpc85xx_qe_init() Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 15/47] soc: fsl: qe: move qe_ic_cascade_* functions to qe_ic.c Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 16/47] soc: fsl: qe: rename qe_ic_cascade_low_mpic -> qe_ic_cascade_low Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 17/47] soc: fsl: qe: remove unused qe_ic_set_* functions Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 18/47] soc: fsl: qe: don't use NO_IRQ in qe_ic.c Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 19/47] soc: fsl: qe: make qe_ic_get_{low,high}_irq static Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 20/47] soc: fsl: qe: simplify qe_ic_init() Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 21/47] soc: fsl: qe: merge qe_ic.h headers into qe_ic.c Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 22/47] soc: fsl: qe: qe.c: use of_property_read_* helpers Rasmus Villemoes
2019-11-08 13:00 ` [PATCH v4 23/47] soc: fsl: qe: qe_io.c: don't open-code of_parse_phandle() Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 24/47] soc: fsl: qe: qe_io.c: access device tree property using be32_to_cpu Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 25/47] soc: fsl: qe: qe_io.c: use of_property_read_u32() in par_io_init() Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 26/47] soc: fsl: move cpm.h from powerpc/include/asm to include/soc/fsl Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 27/47] soc/fsl/qe/qe.h: update include path for cpm.h Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 28/47] serial: ucc_uart: explicitly include soc/fsl/cpm.h Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 29/47] serial: ucc_uart: replace ppc-specific IO accessors Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 30/47] serial: ucc_uart: factor out soft_uart initialization Rasmus Villemoes
2019-11-14  5:14   ` Timur Tabi
2019-11-14  9:00     ` Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 31/47] serial: ucc_uart: stub out soft_uart_init for !CONFIG_PPC32 Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 32/47] serial: ucc_uart: use of_property_read_u32() in ucc_uart_probe() Rasmus Villemoes
2019-11-14 13:57   ` Timur Tabi
2019-11-15  8:01     ` Rasmus Villemoes
2019-11-15 14:35       ` Timur Tabi
2019-11-15 22:44         ` Scott Wood
2019-11-15  4:25   ` Timur Tabi
2019-11-15  7:57     ` Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 33/47] serial: ucc_uart: access __be32 field using be32_to_cpu Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 34/47] soc: fsl: qe: change return type of cpm_muram_alloc() to s32 Rasmus Villemoes
2019-11-12  8:01   ` Qiang Zhao
2019-11-12  8:17     ` Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 35/47] soc: fsl: qe: make cpm_muram_free() return void Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 36/47] soc: fsl: qe: make cpm_muram_free() ignore a negative offset Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 37/47] soc: fsl: qe: drop broken lazy call of cpm_muram_init() Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 38/47] soc: fsl: qe: refactor cpm_muram_alloc_common to prevent BUG on error path Rasmus Villemoes
2019-11-08 13:01 ` Rasmus Villemoes [this message]
2019-11-08 13:01 ` [PATCH v4 40/47] soc: fsl: qe: drop use of IS_ERR_VALUE in qe_sdma_init() Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 41/47] soc: fsl: qe: drop pointless check " Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 42/47] soc: fsl: qe: avoid IS_ERR_VALUE in ucc_fast.c Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 43/47] net/wan/fsl_ucc_hdlc: avoid use of IS_ERR_VALUE() Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 44/47] net/wan/fsl_ucc_hdlc: fix reading of __be16 registers Rasmus Villemoes
2019-11-08 13:01 ` [PATCH v4 45/47] net/wan/fsl_ucc_hdlc: reject muram offsets above 64K Rasmus Villemoes
2019-11-15  4:41   ` Timur Tabi
2019-11-15  7:44     ` Rasmus Villemoes
2019-11-15 14:33       ` Timur Tabi
2019-11-08 13:01 ` [PATCH v4 46/47] net: ethernet: freescale: make UCC_GETH explicitly depend on PPC32 Rasmus Villemoes
2019-11-15  4:35   ` Timur Tabi
2019-11-15  5:44     ` Li Yang
2019-11-15  7:54       ` Rasmus Villemoes
2019-11-15 14:32         ` Timur Tabi
2019-11-15 14:31       ` Timur Tabi
2019-11-08 13:01 ` [PATCH v4 47/47] soc: fsl: qe: remove PPC32 dependency from CONFIG_QUICC_ENGINE Rasmus Villemoes
2019-11-08 23:48   ` Li Yang
2019-11-11  7:33     ` Rasmus Villemoes
2019-11-11 18:11       ` Li Yang
2019-11-13  2:48   ` Qiang Zhao
2019-11-20 19:42   ` kbuild test robot
2019-11-11 23:39 ` [PATCH v4 00/47] QUICC Engine support on ARM and ARM64 Li Yang
2019-11-12 20:45   ` Li Yang
2019-11-13  7:26     ` Rasmus Villemoes

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